Hi Tampatec, That is a similar experience to what I have with an RCA LCD TV. No one makes the main board anymore - and I don't have the schematics for the main board either. I won't get rid of the TV though -- but I might try a workaround - I gather there are universal circuit boards that make monitors into TVs, and I might get one and see if that works to make the TV functional again. Good Luck with your TV.
Tampatec- I had asked you previously about a RCA that would not power up unless it was continuously unplugged and re-plugged with standby light coming on and hitting power button for light to go out but set not coming on until after half a dozen or more times of re-plugging it would power up. The problem was in the main board. I bought a used one (only one I could find) on ebay that was $38 getting it for a $28 offer. It goes to figure that it was the main board as the wires from the power button go straight to the main board. Like you said it was probably a bad capacitor or maybe as I suspicioned the power relay sticking as it played beautifully once it powered on for hours. Anyway just letting you know that the problem was with the main board. Thanks Zed
Tampatech -- Awesome videos...I enjoy your no-nonsense approach with no added fluff!! Any chance you would know what board would control the screen size? I have a Sanyo DP52449, and cannot change the screen size from the stretched image. I tried another remote, but that did not work-- it seems internal to one of the boards. Thanks much!!!
Hi Tampatec ! Did you finally fix the problem with that TV ? I'm actually trying to fix a TV too. It doesn't switches on. The power lies blinks 3 times and stops and blinks again. Thanks to your videos, I learnt a lot, now I try to fix. Thank you for sharing all your experiences and knowledge with us
I suspect that the problem is with the Power Supply Board. Have you done a load test on the 12V rail? Maybe test the Ohm between the A5V and B5V to GND? I suspected that one of them is pulling down to GND. Cheers,
been a sasung tech for over 20 years the test for the power supply is what I told tampatec unplugging the main lead from the power supply to the mainboard and back light turns on . and the other board he got which was defective the 5 volt line stayed high proving again it is the logic mainboard
@@davenay1645 Those power supplies have overload protection which can be broken. Your way of testing will never find such an issue. The backlight does not even use the 5V rail..... so it's not a very good way to test the 5V rail.
I wish there would be a regulation that electronic schematics have to be available for everyone. It would be such a nice help for private repair, repair cafes and others. They exist anyway, so masking their download available beside the manual wouldn't be a big hassle for the companies. Sometimes we can find service manuals, but even those are rare in the wild.
Hey Paul, don't give up on this one. Except the main processor chip isn't faulty there are chances to fix it. Go into board/component level repair ^^ Btw. I love the ERC series (ebay repair challenge) :)
Wanted to first thank you for all your informative videos that got me fixing tvs for hobby and extra spending cash. But thought I'd share my experience with tvpartstoday that I just encountered. I bought a board that worked but the HDMI ports didn't. Returned it for another that didn't work at all. They said they had one more in stock and would send it out, well I waited, and waited, and waited. Finally I called only to find out they had made a stock count error but never thought to tell me. They said they would issue a refund that day. Then I waited, and waited, and waited. A month later I called to ask wth was going on. Long story short, I finally got my refund but only after 3 phone calls and 2 months wait. You might want to call or they will drag their feet issuing your refund.
@UCUjHleYfLwawsJZ5HU_NWsA yeah, believe me I tried everything in the book. The one hdmi input had video but was all pixelated. It was an oled LG board go figure. Probably could've just reflowed the solder and it would have worked but it was a very expensive board and figured for that much it better work right right out of the box. They sell used for 250 plus!
sure that it is the logic board? u already tried a different one and it not only doesn't work it has the same defect? Looks to me more like a problem with the Power-Supply.
BGA BGA BGA take a heat gun to the BGA cover all the plastic. I have 3 tvs right now all i had to do is reflow the BGA chips. the 5v off / on may be the chip heat and bend then cool and contact again.
Hey Tampatec, I watched your video from years ago about fixing the flickering/flashing lights on a Samsung LCD TV by cutting the JP854 wire; I tried to locate that same wire on my Samsung TV model UN40H5003AFXZA, but couldn’t find it. Is there an equivalent I could cut on my TV model, or another way I can fix this problem? Thank you for your time, your videos are very helpful!
that fix doesn't work on all TVs but can be bad power board if LED driver board is builtin the power board or something in the backlight circuit if the backlights are flickering maybe led driver board or LED strips are bad. need to narrow it down by troubleshooting the TV. in this video i show troubleshooting steps.
Hey Tech ! Quick question ( a little off subject ) do you know if anyone sells an LED bulb upgrade for an old Sony DLP? I know nobody cares about DLPs anymore but I would love to see maybe a real quick vid on this subject ! Thank you bro have a good one and keep up the great work!
Hello, I have a quick question. Definitely understand the video and it's helpful. My question is the main board that I want to replace have a set of wires that is attached to the board but also connected to the metal backplate. I think it have to do with the grounding. Can't take out unless I cut the cable. What are the options I have
You said you're still waiting for a refund from TVPartstoday. I've gotten 2 bad boards from them, which are both 10 years old. I'm wondering if they are selling salvaged boards from junked TVs, NOT new TVs simply damaged in shipping. It would have had to be 10 years ago! Any thoughts?
Hi Tampatec - thanks for all this tv repair videos. I am hoping you can shed some light on my question. I have a sony KD-65X9000B tv that have massive vertical line in the middle about 3inch thick. This TV is quite expensive about $4700 AUD 3 yrd ago. I have purchased a tcon board but what surprises me is that the tcon board of this sony is the same with the 65" TCL TV. The ad was for a TCL but it is exact the same part. If the tcon replacement wont fix it - does it mean that the TCL 65 TV have the same panel as the Sony TV? Thanks in advance :)
Are you a part owner of Shop JImmy? Everytime I've tried to order any board from them they always say out of stock. Three years trying with no success.
I think he mainboard has a short circuit , search the component who is in short with a power supply injecting low amps and a thermal camera or freeze spray or alcohol...
Hi Paul, I have a Samsung UA48 Sound ok, Picture no, Backlight ok, Voltages ok. Its the T.Con card? I can't see any suspicious thing on it. Can be the Display too, right?
I am so invested in this "unwanted series" haha I have a 42 inch lcd that just shut off on me while I was watching it and there is no standby light either. I don't know the first thing about TV repair.
I have a UN75MU630DFXZA and I’m needing a main board but can’t find it anywhere (that’s not price gouging). The board it shows I need is a BN94-12784P FB03 version. Have you dealt with these and is there another main board that is compatible with this TV that I can use?
Look for a main board for a larger screen model with the same suffix model. For instance. 46c7000. Try a 50 or 55c7000. Of course using you model number. Making sure that the last three letters are the same. Ex. XZA. Good luck. What is the model your working. On.
I have a Samsung LN55C610N1FXZA with intermittent vertical color lines. There is no pattern I can see to when they appear. All connections on the main and t-con boards are tight. I purchased an LJ94-03291P t-con board to replace the factory one. It worked for awhile, but the intermittent vertical color lines returned. Could this be a main board or cable issue, or did I get a bad t-con board? An thoughts would be appreciated. Thanks.
How do we know the blinking 5VSB isn't a weak 5VSB PS. Put 5V with current limiting from your bench PS to the main board, and/or test 5VSB PS with a load and see if it blinks. Maybe the main boards are fine, and some stupid cap in PS junk. I always give you 👍.
Have a question. My tv feels like the 120mhz is not working anymore. what part would I replace? The main board? Have you ever seen that before? when I first got my tv the soap opera effect was strong and now it don't do it anymore. Thank you for any information. Love your videos bro!
So did you ever get this tv running? My Samsung has similar issues and have been thinking about trying to repair it? Black screen, real slow turning on and off, power light goes out when turned on via remote, “SmartTV” in black & white flashes on screen then goes black? Power light blinks slightly when pushing vol or channel buttons but remains black screen? Any suggestions? Thanks
I think your short circuit protection or overload on your power supply is having problems. Just replace the 5V line (cut it) with that of a lab power supply and test again.
I like your videos. I have a 70 inch sharp tv model number LC-70LE660U . The tv turns on the back lights but won't turn off. There is no picture, none of the buttons work on the control panel. I wonder if you have ran across this problem.
Hi I purchased the driver board for a tcl 50fs5600 hoping it would solve my no picture/sound problem (as sited by one of your previous vids) and after replacing it I still have the same issue. I know I have picture because if I shut the lights out and power on tv I see HDMI 3 then a no signal (not hooked up to anything) and can use remote to see menu items etc. Do you think it is an individual led backlight issue? Also what amp wattage etc would the led lights be? Do "any" leds work or do they have to be specific to that model? Or do you think it is a different issue altogether? Any help would be greatly appreciated!!! Mark
Hey. I have a 75 inches tv that is rebooting it self. I already opened it and check it out. I found out that some mosfet were overheating. I checked it with the multimeter. Looks like of the mosfet burned but idk where to get it here in New York. Any website? Another thing. I want to make sure if that mosfet have anything to do with before spending money on it. (First time i mess with a tv)
I have 2 PN LE801 Aquos TVs. One has a green line ~ 10" from the right and the other has a "cloud" blaing out the right side. What part(s) do you think I may need to resolve?
Thank you for sharing information on how to repair the TV. But I have a problem, I have Vio TV repair, and my 1st suspect was the Power Supply. The voltage connected to LED back panel quickly goes down from 180V to 0V in few second and screen turn to black. I ordered another Power Supply but then after installed the Voltage still drop. Pls advice
Love the vids man. I have a Panasonic Plasma I’m trying to revive. So I feel your internal annoyance when you get a board and it doesn’t solve the issue. Good learning experience
Have you tried reflowing the logic processors with a heat gun. heat them up good and hot then apply light pressure to them as they cool. Or go to Northridgefix youtube channel and watch him remove a logic and then reinstall it. He makes it look easy, probably because he is one of the best in the biz.
@@TampaTec Right on brother. I remember the days of the xbox 360's. Where the cpu and gpu would need to be super heated and reflowed to get the machine to come back on line. Then install a mod kit on the heat sinks to apply more pressure on the chips. Back then we didnt have all these neat new machines that make it easier and just plain fun. But yeah for real Alex over at Northridgefix is the bomb bro. Super great guy with alot of knowledge. I like your videos and think you do great work to, wanted to try and lend some support. Happy Holidays in these crazy times. Peace.
I don’t get an backlight at all but I do get a standby light but there’s no standby voltage on the bottom pin which says power on and my replacement board so is it the main board or should I just try to get another power supply
It easy to fix a main board tampatec... these are the most common volts u will find on a good main board 3.3v 5v 12v 1.2 or 1.3 volts ... check on the 4 ot 5 coils you have on the main board and these are the most common volts to look for...
I know your good at fixing TVs I have a dynex tv model number DX-46L261A12 I don’t know if that will help but my tv will turn on and say “please wait” then it will stay on for about 10-30 seconds then the screen will go blank. I don’t know if there it a way to fix it but it would be great to here back from you.
hi I have the same Problen with my Samsung ks8090 55 inch So i got i Mainboard from ks9090 The BN41-02504A are the same on both Mainboards but the BN94 are different. Can i plug the KS9090 Mainboard on my KS8090 TV ???
Makes me feel better about the $200 I pumped into my LG uselessly, I suppose. Sorry about the schadenfreude. I did learn something about unplugging to see if the voltage is there on standby. So Dúolingo is true, we can learn from our failures! thanks.
Why didn't you check if the mainboard is sending the shutdown signal to the power supply via the optocouplers? You could've also fed some voltage to the motherboard from a bench power supply to see how it behaves. You can't conclude too much from what you did.
I have a polaroid tv that just stopped working. I replaced the mainboard and the power board, Then nothing so I found that the fuse was blown so I replaced that. Now it starts up for about 2-3 seconds then stops it does have the standby light. do you think I need to replace the t con board?. Another thing when the screen does light up its green. I did do the flashlight thing and I can see it's on. I am hoping it's not the led light strips. this is a $1200.00 tv so I want it back. I purchased a newer tv and I think they're just to cheap and I do not think it will last. Ant suggestions?
HI, great video. Could you please advise, I have led light on but when turning on, screen goes with `SMART TV` logo and then remains black, no audio, nothing apart of black screen and all the led lights on - would this be motherboard? Appreciate your reply )
I've just bought a Samsung q80r QLED TV, the motherboard is getting quite hot after playing HDR content. The HDMI ports also make a slight whining sound when on standby, is this something to be worried about?
Hang in there. Keep plugging. Weird both boards do the same thing. There must be a common failure on those boards. You might get lucky and find a forum that has fixed these boards before since it seems to be a common failure..
BN94 or BN97 main board. Hope this helps someone. I also have one of these TV kind of broken. It only shows a decent image when it's hot. Also tried to ficnd a main board but was unable too.
Are you familiar with V over IR? Just because you have volts with no load doesn't mean you have amps. Plugging in the logic board gives you the load, and your volts disappear. You have a PSU issue my friend. And you have screwed an eBayer out of 50 bucks.
Hello started following you a little while ago got multi colour lines that change slightly when I play with the remote but no picture or set up guide picture 55" Samsung smart TV
I did replace a Samsung Australian main board with a Chinese main board. Everything is working fine but tuning is not finding any channels. Is there anything I can do to fix this problem?
Hi friend, I have a Samsung 58inch and it switched off the other day it won’t turn back on; the standby button not on. I been trying to look for a power board and I can’t seem to find one. Any help?
So, if eBay was the only place you found the board, now you're out of options? Maybe you can get it from China (Aliexpress). You didn't mention the part number otherwise I would've searched it there.
Hey Tampa What Do You Think O Someone Like 12 volts Vids Working On Old Audio Equipment? To Me It's A Waste Cause Where Are People Like Him Are GonnaFind Parts For That Old Equipment?
HEY TAMPATEC I HAVE A DESK TOP MONITOR THAT IT WAS BLINKING BLUE LIGHT AND TOOK LIKE 20 BLINKS BUT IT WOULD GO ON I OPEN IT AND FOUND A POP CAP CHANGE IT AND NOW STILL BLINK BLUE BUT IT WONT GO ON CAN U HELP ME THANKS.
Yes, back light set is $35, capacitors, transisters, diodes, fuse, mosfets, ect. Come within 3 weeks and very good quality so far. I'm in it for the fascination and satisfaction of diagnosing the problem and then fixing it. Not for income.
@@TampaTec what's the chances the 5.16 standby you have doesn't have any balls{amps}? to weak to fire up the main board functions? norcal built a load tester for powersupply's ,. or maybe use an artificial load on the standby..from the power supply. heck, i'm thinking there should be enough amps to charge an old 5volt cell phone? or a little led desk lamp?
I Never Go On Ebay. Cause You Can Get Stung. & Anotherthing I Don't Rebuild Boards Either. Cause If You Get A New Board You'r Better You'r Self Anyways Cause You Get Brand NewEverything. That way You Don't get Stung. & Besides I Never Use Rebuilt Parts Anyways. I Go All Out With Brand New
Hi Tampatec, That is a similar experience to what I have with an RCA LCD TV. No one makes the main board anymore - and I don't have the schematics for the main board either. I won't get rid of the TV though -- but I might try a workaround - I gather there are universal circuit boards that make monitors into TVs, and I might get one and see if that works to make the TV functional again. Good Luck with your TV.
Tampatec- I had asked you previously about a RCA that would not power up unless it was continuously unplugged and re-plugged with standby light coming on and hitting power button for light to go out but set not coming on until after half a dozen or more times of re-plugging it would power up. The problem was in the main board. I bought a used one (only one I could find) on ebay that was $38 getting it for a $28 offer. It goes to figure that it was the main board as the wires from the power button go straight to the main board. Like you said it was probably a bad capacitor or maybe as I suspicioned the power relay sticking as it played beautifully once it powered on for hours. Anyway just letting you know that the problem was with the main board. Thanks Zed
I feel your pain. I was given a 55 Samsung no backlight. I restored it by replacing all of the led s. You were a great help. Good luck!
Tampatech -- Awesome videos...I enjoy your no-nonsense approach with no added fluff!! Any chance you would know what board would control the screen size? I have a Sanyo DP52449, and cannot change the screen size from the stretched image. I tried another remote, but that did not work-- it seems internal to one of the boards. Thanks much!!!
Hi Tampatec !
Did you finally fix the problem with that TV ? I'm actually trying to fix a TV too. It doesn't switches on. The power lies blinks 3 times and stops and blinks again. Thanks to your videos, I learnt a lot, now I try to fix. Thank you for sharing all your experiences and knowledge with us
Dave, I'm fully confident you are gonna get that sammy whipped into shape.
I suspect that the problem is with the Power Supply Board. Have you done a load test on the 12V rail? Maybe test the Ohm between the A5V and B5V to GND? I suspected that one of them is pulling down to GND. Cheers,
been a sasung tech for over 20 years the test for the power supply is what I told tampatec unplugging the main lead from the power supply to the mainboard and back light turns on .
and the other board he got which was defective the 5 volt line stayed high proving again it is the logic mainboard
@@davenay1645 Those power supplies have overload protection which can be broken. Your way of testing will never find such an issue. The backlight does not even use the 5V rail..... so it's not a very good way to test the 5V rail.
I wish there would be a regulation that electronic schematics have to be available for everyone. It would be such a nice help for private repair, repair cafes and others. They exist anyway, so masking their download available beside the manual wouldn't be a big hassle for the companies.
Sometimes we can find service manuals, but even those are rare in the wild.
it's called the FCC
Hey Paul, don't give up on this one. Except the main processor chip isn't faulty there are chances to fix it. Go into board/component level repair ^^ Btw. I love the ERC series (ebay repair challenge) :)
Wanted to first thank you for all your informative videos that got me fixing tvs for hobby and extra spending cash. But thought I'd share my experience with tvpartstoday that I just encountered. I bought a board that worked but the HDMI ports didn't. Returned it for another that didn't work at all. They said they had one more in stock and would send it out, well I waited, and waited, and waited. Finally I called only to find out they had made a stock count error but never thought to tell me. They said they would issue a refund that day. Then I waited, and waited, and waited. A month later I called to ask wth was going on. Long story short, I finally got my refund but only after 3 phone calls and 2 months wait. You might want to call or they will drag their feet issuing your refund.
Thanks for sharing hopefully they'll see this and fix the issue Or just dislike the video. 🤷♂️
@UCUjHleYfLwawsJZ5HU_NWsA yeah, believe me I tried everything in the book. The one hdmi input had video but was all pixelated. It was an oled LG board go figure. Probably could've just reflowed the solder and it would have worked but it was a very expensive board and figured for that much it better work right right out of the box. They sell used for 250 plus!
@@TampaTec hey tampatec is there an update for what was needed to fix the main board?
sure that it is the logic board? u already tried a different one and it not only doesn't work it has the same defect? Looks to me more like a problem with the Power-Supply.
Please make videos every 2-3 days
Very long waiting
BGA BGA BGA take a heat gun to the BGA cover all the plastic. I have 3 tvs right now all i had to do is reflow the BGA chips. the 5v off / on may be the chip heat and bend then cool and contact again.
I'm here to see the new board for your broken Samsung LCD TV
nice channel bro!
Thank you @@TampaTec
do you have any tv repair books that i should get that will help me in tv repair
Hey Tampatec, I watched your video from years ago about fixing the flickering/flashing lights on a Samsung LCD TV by cutting the JP854 wire; I tried to locate that same wire on my Samsung TV model UN40H5003AFXZA, but couldn’t find it. Is there an equivalent I could cut on my TV model, or another way I can fix this problem? Thank you for your time, your videos are very helpful!
that fix doesn't work on all TVs but can be bad power board if LED driver board is builtin the power board or something in the backlight circuit if the backlights are flickering maybe led driver board or LED strips are bad. need to narrow it down by troubleshooting the TV. in this video i show troubleshooting steps.
Tampatec thanks for the reply!
Hey Tech ! Quick question ( a little off subject ) do you know if anyone sells an LED bulb upgrade for an old Sony DLP? I know nobody cares about DLPs anymore but I would love to see maybe a real quick vid on this subject ! Thank you bro have a good one and keep up the great work!
Very helpful video 👍 I like it
Hello, I have a quick question. Definitely understand the video and it's helpful. My question is the main board that I want to replace have a set of wires that is attached to the board but also connected to the metal backplate. I think it have to do with the grounding. Can't take out unless I cut the cable. What are the options I have
I think your over-current detection on your power supply is defective. Look for small resistors in the power path.
You said you're still waiting for a refund from TVPartstoday. I've gotten 2 bad boards from them, which are both 10 years old. I'm wondering if they are selling salvaged boards from junked TVs, NOT new TVs simply damaged in shipping. It would have had to be 10 years ago! Any thoughts?
Hi Tampatec - thanks for all this tv repair videos. I am hoping you can shed some light on my question.
I have a sony KD-65X9000B tv that have massive vertical line in the middle about 3inch thick. This TV is quite expensive about $4700 AUD 3 yrd ago.
I have purchased a tcon board but what surprises me is that the tcon board of this sony is the same with the 65" TCL TV. The ad was for a TCL but it is exact the same part.
If the tcon replacement wont fix it - does it mean that the TCL 65 TV have the same panel as the Sony TV?
Thanks in advance :)
Are you a part owner of Shop JImmy? Everytime I've tried to order any board from them they always say out of stock. Three years trying with no success.
I think he mainboard has a short circuit , search the component who is in short with a power supply injecting low amps and a thermal camera or freeze spray or alcohol...
Its almost like a capacitor charging and then discharging....at least on the original board.
Interesting concept. Is there a tutorial where I can see/learn more of this technique?
I would like to know more.
hey there. are laptop powerpacks repairable?
Hi Paul, I have a Samsung UA48 Sound ok, Picture no, Backlight ok, Voltages ok. Its the T.Con card? I can't see any suspicious thing on it. Can be the Display too, right?
I am so invested in this "unwanted series" haha
I have a 42 inch lcd that just shut off on me while I was watching it and there is no standby light either. I don't know the first thing about TV repair.
No standby light is a common issue with a faulty power supply
very informative video.
Thanks
I have a UN75MU630DFXZA and I’m needing a main board but can’t find it anywhere (that’s not price gouging). The board it shows I need is a BN94-12784P FB03 version. Have you dealt with these and is there another main board that is compatible with this TV that I can use?
Look for a main board for a larger screen model with the same suffix model. For instance. 46c7000. Try a 50 or 55c7000. Of course using you model number. Making sure that the last three letters are the same. Ex. XZA. Good luck. What is the model your working. On.
I have a Samsung LN55C610N1FXZA with intermittent vertical color lines. There is no pattern I can see to when they appear. All connections on the main and t-con boards are tight. I purchased an LJ94-03291P t-con board to replace the factory one. It worked for awhile, but the intermittent vertical color lines returned. Could this be a main board or cable issue, or did I get a bad t-con board? An thoughts would be appreciated. Thanks.
How do we know the blinking 5VSB isn't a weak 5VSB PS. Put 5V with current limiting from your bench PS to the main board, and/or test 5VSB PS with a load and see if it blinks. Maybe the main boards are fine, and some stupid cap in PS junk. I always give you 👍.
true but i did a cap kit on the PS board
Hey thanks for the lesson
problem is with the Power Supply not the main board. there is a short on the Power Supply. Test each rail on the Power Supply.
Upload the video if you get the schematics and decide to fix that main logic board
Did you ever get it fixed? what was the problem?
Have a question. My tv feels like the 120mhz is not working anymore. what part would I replace? The main board? Have you ever seen that before? when I first got my tv the soap opera effect was strong and now it don't do it anymore. Thank you for any information. Love your videos bro!
So did you ever get this tv running? My Samsung has similar issues and have been thinking about trying to repair it? Black screen, real slow turning on and off, power light goes out when turned on via remote, “SmartTV” in black & white flashes on screen then goes black? Power light blinks slightly when pushing vol or channel buttons but remains black screen? Any suggestions? Thanks
I think your short circuit protection or overload on your power supply is having problems. Just replace the 5V line (cut it) with that of a lab power supply and test again.
what model is your tv?
I like your videos. I have a 70 inch sharp tv model number LC-70LE660U . The tv turns on the back lights but won't turn off. There is no picture, none of the buttons work on the control panel. I wonder if you have ran across this problem.
What is the model number of that tv? Have you searched the web for a service manual yet? I’m sure you have but I may have one.
Big Thumbs up!
Indiana USA.
Hi I purchased the driver board for a tcl 50fs5600 hoping it would solve my no picture/sound problem (as sited by one of your previous vids) and after replacing it I still have the same issue. I know I have picture because if I shut the lights out and power on tv I see HDMI 3 then a no signal (not hooked up to anything) and can use remote to see menu items etc. Do you think it is an individual led backlight issue? Also what amp wattage etc would the led lights be? Do "any" leds work or do they have to be specific to that model? Or do you think it is a different issue altogether? Any help would be greatly appreciated!!! Mark
Nice tv fixing videos so cool 🙂
Keep goin’ Tampatec!
Hey. I have a 75 inches tv that is rebooting it self. I already opened it and check it out. I found out that some mosfet were overheating. I checked it with the multimeter. Looks like of the mosfet burned but idk where to get it here in New York. Any website? Another thing. I want to make sure if that mosfet have anything to do with before spending money on it. (First time i mess with a tv)
I have 2 PN LE801 Aquos TVs. One has a green line ~ 10" from the right and the other has a "cloud" blaing out the right side. What part(s) do you think I may need to resolve?
Thank you for sharing information on how to repair the TV. But I have a problem, I have Vio TV repair, and my 1st suspect was the Power Supply. The voltage connected to LED back panel quickly goes down from 180V to 0V in few second and screen turn to black. I ordered another Power Supply but then after installed the Voltage still drop. Pls advice
Love the vids man. I have a Panasonic Plasma I’m trying to revive. So I feel your internal annoyance when you get a board and it doesn’t solve the issue.
Good learning experience
Have you tried reflowing the logic processors with a heat gun. heat them up good and hot then apply light pressure to them as they cool. Or go to Northridgefix youtube channel and watch him remove a logic and then reinstall it. He makes it look easy, probably because he is one of the best in the biz.
I'll check it out thanks.
@@TampaTec Right on brother. I remember the days of the xbox 360's. Where the cpu and gpu would need to be super heated and reflowed to get the machine to come back on line. Then install a mod kit on the heat sinks to apply more pressure on the chips. Back then we didnt have all these neat new machines that make it easier and just plain fun. But yeah for real Alex over at Northridgefix is the bomb bro. Super great guy with alot of knowledge. I like your videos and think you do great work to, wanted to try and lend some support. Happy Holidays in these crazy times. Peace.
I don’t get an backlight at all but I do get a standby light but there’s no standby voltage on the bottom pin which says power on and my replacement board so is it the main board or should I just try to get another power supply
Hi tampatec, any vids on a Samsung model un65ks8000? Mine just keeps on the power up cycle ...thanks
It easy to fix a main board tampatec... these are the most common volts u will find on a good main board 3.3v 5v 12v 1.2 or 1.3 volts ... check on the 4 ot 5 coils you have on the main board and these are the most common volts to look for...
I know your good at fixing TVs I have a dynex tv model number DX-46L261A12 I don’t know if that will help but my tv will turn on and say “please wait” then it will stay on for about 10-30 seconds then the screen will go blank. I don’t know if there it a way to fix it but it would be great to here back from you.
hi I have the same Problen with my Samsung ks8090 55 inch
So i got i Mainboard from ks9090
The BN41-02504A are the same on both Mainboards but the BN94 are different.
Can i plug the KS9090 Mainboard on my KS8090 TV ???
Makes me feel better about the $200 I pumped into my LG uselessly, I suppose. Sorry about the schadenfreude. I did learn something about unplugging to see if the voltage is there on standby. So Dúolingo is true, we can learn from our failures! thanks.
Why didn't you check if the mainboard is sending the shutdown signal to the power supply via the optocouplers? You could've also fed some voltage to the motherboard from a bench power supply to see how it behaves. You can't conclude too much from what you did.
I have a polaroid tv that just stopped working. I replaced the mainboard and the power board, Then nothing so I found that the fuse was blown so I replaced that. Now it starts up for about 2-3 seconds then stops it does have the standby light. do you think I need to replace the t con board?. Another thing when the screen does light up its green. I did do the flashlight thing and I can see it's on. I am hoping it's not the led light strips. this is a $1200.00 tv so I want it back. I purchased a newer tv and I think they're just to cheap and I do not think it will last. Ant suggestions?
Did You Try Amazon?
HI, great video. Could you please advise, I have led light on but when
turning on, screen goes with `SMART TV` logo and then remains black, no
audio, nothing apart of black screen and all the led lights on - would
this be motherboard? Appreciate your reply )
Hi tempatempa...i have samsung un46h620 ..powers on..no backlight and wont power off using power button...very bizarre ...can you assist?
I've just bought a Samsung q80r QLED TV, the motherboard is getting quite hot after playing HDR content. The HDMI ports also make a slight whining sound when on standby, is this something to be worried about?
Hang in there. Keep plugging. Weird both boards do the same thing. There must be a common failure on those boards. You might get lucky and find a forum that has fixed these boards before since it seems to be a common failure..
Hey Great video,I have a samsung 55 inch tv.Changed back lights .Now I have vertical lines and double image.Any ideas?
maybe you damaged tcom board or the cable to lcd panel check that.
You should add the TV models to your videos. That way, other people can try to fix theirs or at least know what is wrong.
BN94 or BN97 main board. Hope this helps someone. I also have one of these TV kind of broken. It only shows a decent image when it's hot. Also tried to ficnd a main board but was unable too.
lmfao, this is the tv that just keeps giving. not giving anything good, but giving! :P
Fairly sure is a cross negative n positive board shuts off some place
Are you familiar with V over IR? Just because you have volts with no load doesn't mean you have amps. Plugging in the logic board gives you the load, and your volts disappear. You have a PSU issue my friend. And you have screwed an eBayer out of 50 bucks.
Hello started following you a little while ago got multi colour lines that change slightly when I play with the remote but no picture or set up guide picture 55" Samsung smart TV
I did replace a Samsung Australian main board with a Chinese main board. Everything is working fine but tuning is not finding any channels. Is there anything I can do to fix this problem?
Is there any way you could help me with my LG 60 inch looking for a minepower supply board 😖
Can i asked what model of ur tester?
fluke 12
hey Tampatec can i have the model number for that samsung tv?
Why the Refund is so slow?
Hi friend, I have a Samsung 58inch and it switched off the other day it won’t turn back on; the standby button not on. I been trying to look for a power board and I can’t seem to find one. Any help?
Hey I need some help with a Sony 65X900E not powering up.
No update on this one yet?
Sad part. EBay should test their part before selling.
Whats tne whole part number i have a bunch of bn94 and bn97 boards that where removed from broken screen tv’s.
Whats the numbers on the board, I probably have one that works, I have 1,000 s of boards
So, if eBay was the only place you found the board, now you're out of options? Maybe you can get it from China (Aliexpress). You didn't mention the part number otherwise I would've searched it there.
Hey Tampa What Do You Think
O Someone Like 12 volts Vids
Working On Old Audio
Equipment? To Me It's A Waste
Cause Where Are People Like
Him Are GonnaFind Parts For That Old Equipment?
Capacitors on main PSU, check the back light power supply / inverter, these are usually the culprits. Bet the mainboard is OK.
The refund. The refund. The refund.
HEY TAMPATEC I HAVE A DESK TOP MONITOR THAT IT WAS BLINKING BLUE LIGHT AND TOOK LIKE 20 BLINKS BUT IT WOULD GO ON I OPEN IT AND FOUND A POP CAP CHANGE IT AND NOW STILL BLINK BLUE BUT IT WONT GO ON CAN U HELP ME THANKS.
You don’t need a scope to trace the boards. Bet its a mosfet thats dead or a couple diodes.
MY 3D GLASSES DON'T PAIR MY TV SAMSUNG. DO I NEED A WHOLE NEW MAINBOARD OR JUST REPAIR THE BLUETOOTH TRANSMITTER IN IT? THANKS.
Who else is here from MyMateVince?
Sir..I need Samsung Lcd Tv Service manual.which model no. LA32D580K4R.
Kindly help me.
that happen in any tv if i unplug the main board, the ligths tur on ??
why not fixed the old board ?!
I have an LG with dead back light. Anyone know Where can a Canadian get replacement parts?
China
@@Franklinveterinarycenter1of4 Have you tried ordering from China lately?
Yes, back light set is $35, capacitors, transisters, diodes, fuse, mosfets, ect. Come within 3 weeks and very good quality so far. I'm in it for the fascination and satisfaction of diagnosing the problem and then fixing it. Not for income.
SEND IT TO NORCAL715
he is a good tech
@@TampaTec what's the chances the 5.16 standby you have doesn't have any balls{amps}? to weak to fire up the main board functions?
norcal built a load tester for powersupply's ,. or maybe use an artificial load on the standby..from the power supply. heck, i'm thinking there should be enough amps to charge an old 5volt cell phone? or a little led desk lamp?
a cap on the board might of gone short
Kindly update us sir.for further trouble.if any.☺☺☺thanks...god bless...
Went on vacation n return found tv on. Now tv has color problems. Barely can see the pictures. What can be the problem? It's a Samsung tv .
Some people know something 😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍😍
tv parts company tv parts company
I Never Go On Ebay. Cause
You Can Get Stung. & Anotherthing
I Don't Rebuild Boards Either.
Cause If You Get A New Board
You'r Better You'r Self Anyways
Cause You Get Brand NewEverything.
That way You Don't get Stung.
& Besides I Never Use Rebuilt Parts Anyways. I Go All Out With Brand New