Nice fix, the trouble with these leds tvs is pretty much all brands cheap and premium are shipped with picture settings maxed out and many folk dont bother changing the settings so those leds are running maxed out day in day out doesn't take a genius to work out that they aren't going to last very long in that state, my samsung qled was just the same everything was on 100% picture wise i thought i was sunning my self in spain when the fecker first turned on, i prefer a real dark picture so brought mine down to my comfortable 15 to 20% as i only watch tv at night when i get home from work, also low settings make the tv last, this is very much like the rules you applied to the old crts to make the guns last longer keep the picture down low and they would last for ever.
Nice job. As you noted, the led's are run in series, so for that reason they are designed to fail shorted, otherwise the failure of a single led would mean no picture. The supply works on constant current, so it compensates automatically for some shorted led's by lowering the voltage - I also have read that more led's than are necessary for a good picture are built into tv's, so that a small number of faulty ones aren't too noticeable. It seems that the second of your led's failed open, so stopping the rest from working...
Will Doherty good to know about them failing shorted. That makes sense. Unfortunately, the backlight died on this TV again about 4 months after I published the video. I’ve had the tv on my work bench for months, I just haven’t had time to tear it back down to see if the same LED’s failed or if it happens to be one of the other original LED’s. These Hitachi’s are notoriously bad for backlights burning out. I’ll try to post a update after I get it apart again.
Thanks for the video. I fixed mine with one open LED. A week later it quit again and replace one shorted and one open LED on different strips. Time will tell, but afraid they are all a problem.
Steve Beckwith thankfully mine is still going good...except the lens fell off of one of the LEDs that I replaced so I’ve got a bright spot in the screen. I’m able to live with it for now.
How did you determine that the power supply board was putting out ample voltage? What should the voltage be for both of the connectors going to the back lights?
@@DustinRogersinMO I understand you measured 191V for the top one. Is that normal voltage? I know you said 250+V indicates an open in the circuit. I am trying to rule out the power supply board, but I can't find specs anywhere for what the voltage is supposed to be at those connectors.
DeeGi the TV I was working on had 66 LEDs wired in series. They were 3V LEDs, so 3 x 66 will require at least 198V to power them all. If you’ve got at least the minimum voltage required to power all the LEDs in your TV, I would assume that your power supply is fine. If you have this same exact model of TV, I’d be willing to bet money that it’s got at least one bad LED. I posted a follow up in another comment or maybe the video description, that this repair only lasted about 2 months of occasional use before another, different LED failed. If you pinpoint that an LED failed, I’d recommend either ordering new replacement strips, or replacing all 66 LEDs, otherwise you’re just going to have it back apart in a couple months.
Hi Dustin: I have a Hitachi LE32E6R9 that just stopped working - no picture or sound. The TV was not dropped or abused. Could it still be LED strips/diodes or the whole circuit board? Thanks.
@@TravelswithJoeEly it could be a backlight issue. Some of the main boards will wait for a signal that indicates the backlight is powered up before activating the main board. You may pull the back cover and check try doing a similar voltage check that I did in this video. Not sure if that model will have the same voltage readings, but you may be able to find testing process by searching the model number on the badcaps.net forums.
Hi, I have Hitachi 43 inch 43hk25t74u led tv. And it has broken led in 2 strips. Could you please say how much will be the volt of led is it 3v or 6v?.. Thank you
How do you determine which voltage of LEDs are needed for the TV? I have a 32"Hitachi that has a faint picture present, brightness control has no effect on picture, all else is ok, knock on wood.
Unless you can do some research on your specific model to see if anyone specifies what size and voltage LEDs are used, there’s not a good way to know without getting the TV apart. Typically the LED backlights in these TVs are all or nothing. I’ve only seen one brand - Insignia, that wires the LED strips in parallel on some models, so that the backlight can go out gradually (Video here : th-cam.com/video/EPU9lyh-rU8/w-d-xo.html). Also, depending on the age of the TV, some older TVs use tiny fluorescent tubes instead of LED strips. I’ve also seen those go out “gradually”. The label on the rear panel of the TV usually indicate “Contains Mercury” if it uses fluorescent lights though.
I had a hell of a time getting the deflector off because of the 2 sided tape. I tore a little place in it and crinkled it in some places. Wonder how messed up this will be? Also when I put my meter on the diode scale and put leads on any of the leds in the tiny test places, no lights came on. I went to the end of each board and checked the diodes and they seemed to be good and none of the leds looked burned
DallasPilotCar I’ve replaced strips in a couple TVs where every single LED was bad. Most of the time it’s just one or two that go out. Test your new strips. If none of the LEDs light up on it, your meter may be faulty, or the battery in your meter may be weak. As far as the ripped/crinkled deflector, I’d just use some clear tape on the backside to prevent further tears. You won’t notice it once it’s reassembled since the diffusers help spread the light a lot.
Hi, great job on the LED repair. Your video didn't show in detail how you applied the flux and solder, along with what type of flux and solder you used. Can you please describe in more detail? Thank you.
It depends on what it uses for backlighting. Some of the older flat screen TVs had fluorescent tubes in them. I’ve never had one of them apart to know what the process entails or if replacement parts are even available. What make and model tv do you have?
hi i have led DENKA 55 smart tv DGS-55UT2SLED i changed the light strips after i powered it up i noticed that only the lower 3 strips work and the 3 strips above are not working i check the strips by tester every group take the same voltage and leds all works but when connect the power supply and check upper group take 84volts and bottom take 130volts what is the problem i checked the pwer supply with strips diconnected i found diffierence but not hight between sides and then checked the resistance of output one side reads in kilo ohms and other in Mega ohmes
Mark Mark66 sounds like the lower strips may have some excessive resistance. You may look for a faulty solder joint on one of the LEDs in those lower three strips, or possibly check any connections between the strips and wires.
@@DustinRogersinMO i checked the strip one by on each strip take 32.3volts and check every group of strips they take same voltage but when connect to power supply bottom has 130v and above has 84v
Mark Mark66 can you measure the amount of amps required to power the upper strips vs the lower strips? I suspect that your tester is able to push more amperage than the power supply, therefore they light up when powered by the tester, but not by the power supply. This leads back to there being excessive resistance somewhere in the circuit of the lower strips.
@@DustinRogersinMO but how can say about the resistance of the out put ports of power supply to strips lower strips port in power supply has k ohms and the upper port reads in mega ohms i think they must has same ports resistance i checked them with and without strips connection
Mark Mark66 so you’re measure the resistance on the connections of the power supply? I’m not sure I understand what you mean. Post a picture somewhere and tag or link it here.
Very common problems on LED tv designed.User turned on brightness control to screen to 70% and beyond.The LEDs diodes workings to hard for days in and days out .So within about two years or more your tv LED strips on the tv will blown only one or two LEDs diodes and shorting out the whole LEDs diodes strip.The tv backlight don’t work anymore.Only the settings to screen brightness to 50% or to 60% maximum.So those LEDs diode on those strips and the driver board don’t burns out too.
That why people buy LED devices designed should know about this and read their owner manual.If people ever bother to reading it.I do thinks the manufacturers do recommended on those owners manuals not turning on screen brightness background to 70% and beyond all lives days in and out using the TVs products.
@@DustinRogersinMO you said that if voltage is over 250 vdc then they is a open in the circuit..i have the led tester and the strips tested good. So unless i know what the voltage should be to each set of 6, i cannot determine if there is a problem with the board that i bought used or if there is still a led circuit problem. You mentioned that you read it some where. I found the service manual but it does not say what the voltage should be
DallasPilotCar how much voltage do you currently have? There are 66 LEDs and are 3V that are wired in series, so you’d need at least 198V. When measuring voltage, you need to check it as soon as the TV turns on because if the backlight doesn’t power up, the voltage drops to around 80V IIRC.
DallasPilotCar probably also need to check the connections to each LED strip. I’ve repaired other TVs that just had a loose connection that caused the open circuit.
Can you help me out here? I got a Hitachi LED TV , model LE55H508, the tv can power on and display pictures, however, the picutre is displayed upside down, can you tell me how to enter the Service Menu of this tv??
Nick Zhao sorry man. I’m not a professional TV repair person. I just share my experiences repairing the few TV’s I’ve encountered. You may search the forums at badcaps.net to see if you can find an answer to your question. I’ve been fortunate enough to find all the info I’ve needed for the models I’ve fixed over on that forum.
Great video, I have a Hitachi LE43A509 with similar LED strips SVJ430A07_rev08_10Led_150403 . 94v E257384 I was wondering if these will be the same type of LED bulbs 3030 I think you said at 3v.
Frank Zell not sure. I’d guess since it’s the same brand that they’d use the same type of LEDs, but the 3030 LEDs do come in a 6v variety, so be sure to test one of your current LEDs to see if 3v will light it up.
Frank Zell check how much voltage is coming from the power supply board then divide that by the number of LEDs your TV has. For example, if you measure 180v at the power supply board/LED driver and you have 60 LEDs, that’d be 3V voltage drop across each LED.
@@DustinRogersinMO Didn't think about that. Good ideal... I checked the volts and it's jumping from 123 ish to 153v. So in theory it's going to be the 3v then bulbs
OmniClimHazard I got them off eBay, but the repair only lasted about 3 months of occasional use before a different LED failed. I replaced that one and then the very next day a different one failed. I’d suggest, based on the age of the TV to replace all the strips because all of the original LED’s are at the end of their life. I ordered my replacement strips from shopjimmy.com
@@DustinRogersinMO Eh.. too expensive from that site. I found the single LED pack but should I get 3V or 6V? If they continue to fail Ill just trash the TV and will have wasted 8$ instead of 60$ haha :)
OmniClimHazard $60 is way cheaper than a new tv. They will continue to fail if you just replace individuals, but if you insist, this Hitachi takes the 3V LED. These are the ones I ordered. www.ebay.com/itm/TV-Backlight-LED-Diode-Hitachi-SMD-3030-3V-1W-CoolWhite-LED-10PCS-TLC-Philips-Yi/132385160906
OmniClimHazard the only reason I didn’t replace all of them from the beginning is that at the time, I could only find used strips. I couldn’t find new strips anywhere.
How did you determine that the led strips needed to be changed? I understand you maybe didn't see any backlight when turning on the TV. But is there a way to determine this before you go inside the TV to check this out?
Gabi Vazquez you have to measure the voltage output to the LED strips. If proper voltage is going to the LED strips, but they are night lighting up, then there’s either a bad led or a connector that’s come unplugged. Either way, you’ll have to tear it down to get to the strips. If you don’t have proper voltage going to the LED strips, then you likely have a power supply/LED driver issue. Watch at 2:00 how I tested the voltage output to the LED’s. I did this first before I tore down the TV. I just did it again for the video to demonstrate.
@@DustinRogersinMO would you happen to know what could be the problem with a TV that has good back lights but no picture on the screen? TCon, power supply, and min boards are all clean and with no damage or burns or blown capacitors. It's got me stuck.
I got this tv for free but, it has no picture and no sound only the blue light comes on for the power or red what ever color. Is it worth buying the parts to fix this TV? I already had to order the power cord and the remote so I am out like $15. I have seen all of the boards in a kit for $70 plus the IR sensors, and then the LED stips I think for under $50. How much did you pay for that little strip of LEDS?
DallasPilotCar it really depends on what exactly is wrong with your TV. Have you done any troubleshooting yet to determine what is the cause of the no sound or picture?
@@DustinRogersinMO I just checked the voltage from the connector that you are talking about and I read 188 volts dc. On the connector above it the red wire to chassis ground I read 267 volts. I tried doing the flashlight test and was not able to see the menu. I have the back off of the TV now but hae not gotten to the LEDs yet.
@@DustinRogersinMO I sent a reply already to this please read that one first. I am worried about bending the screen when I take the back off completely. Did you have suction cups. I am not afraid to work on this TV. Een if I had to spend another $100 it would be better than buying a brand new 55". I just wonder how long the replacement parts will work
DallasPilotCar with the back off, power the tv up. There are enough gaps that if the backlight is working, you should see light coming through the holes where the wire goes through the case. If the backlight is not working, it’s likely an LED strip issue as these are known for going out on these hitachis. IIRC the menu for this tv displays at the bottom of the screen if you want to try the flashlight test again.
abraham masalla abraham masalla if your meter is in diode mode, you need to make sure you put the positive meter lead on the + side of the LED. If you LED strips are not labeled, you may need to switch your leads and test both ways. I have fixed a TV that every single LED was bad. The thing I noticed on those was a little tiny black spot on the face of the LED. Every single one had it. Just a little tiny scorch mark, almost not visible to the naked eye.
Thank you i guess I was using a low quality Multimeter but did figure out if you have a 9v battery it powers it well and found one bad led. Thanks once again. I guess once i was pulling out the plastic cover it pilled off a little will that cause any damage once I assemble it back.
naminsky thanks. Usually getting the back cover off of most TV’s is just a matter of removing 10-20 screws. I usually google for the particular model of TV to see if there are any common issues. A lot of times you’ll find information on how to diagnose that particular issue on that particular model (or the same brand and model series of TV but a different size).
The badcaps(dot)net forums are a good resource to search. You may be able to find someone local to you on that forum that would provide hands on guidance.
I have a Le55w806 Hitachi the back light flashes and goes out green light blinks 8 times. Can't seem to find the problem. Maybe you can help? Thanks robert
Nice fix, the trouble with these leds tvs is pretty much all brands cheap and premium are shipped with picture settings maxed out and many folk dont bother changing the settings so those leds are running maxed out day in day out doesn't take a genius to work out that they aren't going to last very long in that state, my samsung qled was just the same everything was on 100% picture wise i thought i was sunning my self in spain when the fecker first turned on, i prefer a real dark picture so brought mine down to my comfortable 15 to 20% as i only watch tv at night when i get home from work, also low settings make the tv last, this is very much like the rules you applied to the old crts to make the guns last longer keep the picture down low and they would last for ever.
Nice job. As you noted, the led's are run in series, so for that reason they are designed to fail shorted, otherwise the failure of a single led would mean no picture. The supply works on constant current, so it compensates automatically for some shorted led's by lowering the voltage - I also have read that more led's than are necessary for a good picture are built into tv's, so that a small number of faulty ones aren't too noticeable. It seems that the second of your led's failed open, so stopping the rest from working...
Will Doherty good to know about them failing shorted. That makes sense. Unfortunately, the backlight died on this TV again about 4 months after I published the video. I’ve had the tv on my work bench for months, I just haven’t had time to tear it back down to see if the same LED’s failed or if it happens to be one of the other original LED’s. These Hitachi’s are notoriously bad for backlights burning out. I’ll try to post a update after I get it apart again.
Learned a bunch about LED TV's, sorta. Still a box of black magic to me but interesting to watch you fix it with such basic tools.
Thanks for the video. I fixed mine with one open LED. A week later it quit again and replace one shorted and one open LED on different strips. Time will tell, but afraid they are all a problem.
Steve Beckwith thankfully mine is still going good...except the lens fell off of one of the LEDs that I replaced so I’ve got a bright spot in the screen. I’m able to live with it for now.
Can you fix my TV? My Hitachi works but no lights 😢. O much for fixing? I'm live in London Cheshire Street E26EH
How did you determine that the power supply board was putting out ample voltage? What should the voltage be for both of the connectors going to the back lights?
DeeGi I describe it at 2:45 in the video
@@DustinRogersinMO I understand you measured 191V for the top one. Is that normal voltage? I know you said 250+V indicates an open in the circuit. I am trying to rule out the power supply board, but I can't find specs anywhere for what the voltage is supposed to be at those connectors.
DeeGi the TV I was working on had 66 LEDs wired in series. They were 3V LEDs, so 3 x 66 will require at least 198V to power them all. If you’ve got at least the minimum voltage required to power all the LEDs in your TV, I would assume that your power supply is fine.
If you have this same exact model of TV, I’d be willing to bet money that it’s got at least one bad LED. I posted a follow up in another comment or maybe the video description, that this repair only lasted about 2 months of occasional use before another, different LED failed. If you pinpoint that an LED failed, I’d recommend either ordering new replacement strips, or replacing all 66 LEDs, otherwise you’re just going to have it back apart in a couple months.
Hi Dustin: I have a Hitachi LE32E6R9 that just stopped working - no picture or sound. The TV was not dropped or abused. Could it still be LED strips/diodes or the whole circuit board? Thanks.
I might add that the on light turns from red to blue.
@@TravelswithJoeEly it could be a backlight issue. Some of the main boards will wait for a signal that indicates the backlight is powered up before activating the main board. You may pull the back cover and check try doing a similar voltage check that I did in this video. Not sure if that model will have the same voltage readings, but you may be able to find testing process by searching the model number on the badcaps.net forums.
Hi, I have Hitachi 43 inch 43hk25t74u led tv. And it has broken led in 2 strips. Could you please say how much will be the volt of led is it 3v or 6v?.. Thank you
How do you determine which voltage of LEDs are needed for the TV?
I have a 32"Hitachi that has a faint picture present, brightness control has no effect on picture, all else is ok, knock on wood.
Unless you can do some research on your specific model to see if anyone specifies what size and voltage LEDs are used, there’s not a good way to know without getting the TV apart. Typically the LED backlights in these TVs are all or nothing. I’ve only seen one brand - Insignia, that wires the LED strips in parallel on some models, so that the backlight can go out gradually (Video here : th-cam.com/video/EPU9lyh-rU8/w-d-xo.html). Also, depending on the age of the TV, some older TVs use tiny fluorescent tubes instead of LED strips. I’ve also seen those go out “gradually”. The label on the rear panel of the TV usually indicate “Contains Mercury” if it uses fluorescent lights though.
I had a hell of a time getting the deflector off because of the 2 sided tape. I tore a little place in it and crinkled it in some places. Wonder how messed up this will be? Also when I put my meter on the diode scale and put leads on any of the leds in the tiny test places, no lights came on. I went to the end of each board and checked the diodes and they seemed to be good and none of the leds looked burned
DallasPilotCar I’ve replaced strips in a couple TVs where every single LED was bad. Most of the time it’s just one or two that go out. Test your new strips. If none of the LEDs light up on it, your meter may be faulty, or the battery in your meter may be weak. As far as the ripped/crinkled deflector, I’d just use some clear tape on the backside to prevent further tears. You won’t notice it once it’s reassembled since the diffusers help spread the light a lot.
@@DustinRogersinMO What size is the battery in your Multimeter? Is it a 9 volt or 2 each 1.5 volts?
DallasPilotCar mine is a 9V
Hi, great job on the LED repair. Your video didn't show in detail how you applied the flux and solder, along with what type of flux and solder you used. Can you please describe in more detail? Thank you.
Dean Wynn I just used flux and solder for electronic use. I’ll post some links in the video description.
My tv still working but won't stay on I was told because of a light bulb inside is going out how do I repair it at home ???
It depends on what it uses for backlighting. Some of the older flat screen TVs had fluorescent tubes in them. I’ve never had one of them apart to know what the process entails or if replacement parts are even available. What make and model tv do you have?
A fantastic video sir.has helped me loads.thankyou
Where can l buy the led for My t.v.
If you have this same specific model TV - eBay. Just search for “smd 3030 3v 1w” Just make sure you order the 3 volt versions.
hi i have led DENKA 55 smart tv DGS-55UT2SLED i changed the light strips after i powered it up i noticed that only the lower 3 strips work and the 3 strips above are not working i check the strips by tester every group take the same voltage and leds all works but when connect the power supply and check upper group take 84volts and bottom take 130volts what is the problem i checked the pwer supply with strips diconnected i found diffierence but not hight between sides and then checked the resistance of output one side reads in kilo ohms and other in Mega ohmes
Mark Mark66 sounds like the lower strips may have some excessive resistance. You may look for a faulty solder joint on one of the LEDs in those lower three strips, or possibly check any connections between the strips and wires.
@@DustinRogersinMO i checked the strip one by on each strip take 32.3volts and check every group of strips they take same voltage but when connect to power supply bottom has 130v and above has 84v
Mark Mark66 can you measure the amount of amps required to power the upper strips vs the lower strips? I suspect that your tester is able to push more amperage than the power supply, therefore they light up when powered by the tester, but not by the power supply. This leads back to there being excessive resistance somewhere in the circuit of the lower strips.
@@DustinRogersinMO but how can say about the resistance of the out put ports of power supply to strips lower strips port in power supply has k ohms and the upper port reads in mega ohms i think they must has same ports resistance i checked them with and without strips connection
Mark Mark66 so you’re measure the resistance on the connections of the power supply? I’m not sure I understand what you mean. Post a picture somewhere and tag or link it here.
Very common problems on LED tv designed.User turned on brightness control to screen to 70% and beyond.The LEDs diodes workings to hard for days in and days out .So within about two years or more your tv LED strips on the tv will blown only one or two LEDs diodes and shorting out the whole LEDs diodes strip.The tv backlight don’t work anymore.Only the settings to screen brightness to 50% or to 60% maximum.So those LEDs diode on those strips and the driver board don’t burns out too.
Chi Chu sadly, I think the default on most TVs is probably set to 100% brightness. How else are the manufacturers going to get people to buy more TVs?
That why people buy LED devices designed should know about this and read their owner manual.If people ever bother to reading it.I do thinks the manufacturers do recommended on those owners manuals not turning on screen brightness background to 70% and beyond all lives days in and out using the TVs products.
Do you know what the voltage should be for each of the 2 connectors that go out to the LEDs from the power supply board?
DallasPilotCar I think I say in the video
@@DustinRogersinMO you said that if voltage is over 250 vdc then they is a open in the circuit..i have the led tester and the strips tested good. So unless i know what the voltage should be to each set of 6, i cannot determine if there is a problem with the board that i bought used or if there is still a led circuit problem. You mentioned that you read it some where. I found the service manual but it does not say what the voltage should be
DallasPilotCar how much voltage do you currently have? There are 66 LEDs and are 3V that are wired in series, so you’d need at least 198V. When measuring voltage, you need to check it as soon as the TV turns on because if the backlight doesn’t power up, the voltage drops to around 80V IIRC.
DallasPilotCar probably also need to check the connections to each LED strip. I’ve repaired other TVs that just had a loose connection that caused the open circuit.
Can you help me out here? I got a Hitachi LED TV , model LE55H508, the tv can power on and display pictures, however, the picutre is displayed upside down, can you tell me how to enter the Service Menu of this tv??
Nick Zhao sorry man. I’m not a professional TV repair person. I just share my experiences repairing the few TV’s I’ve encountered. You may search the forums at badcaps.net to see if you can find an answer to your question. I’ve been fortunate enough to find all the info I’ve needed for the models I’ve fixed over on that forum.
@@DustinRogersinMO Thank You, I already ask a friend of mine to get me another mainboard.
Great video, I have a Hitachi LE43A509 with similar LED strips SVJ430A07_rev08_10Led_150403 . 94v E257384
I was wondering if these will be the same type of LED bulbs 3030 I think you said at 3v.
Frank Zell not sure. I’d guess since it’s the same brand that they’d use the same type of LEDs, but the 3030 LEDs do come in a 6v variety, so be sure to test one of your current LEDs to see if 3v will light it up.
@@DustinRogersinMO I just checked with 3v and they light up. Then I tried 6v and they were bright. I'm not sure now
Frank Zell check how much voltage is coming from the power supply board then divide that by the number of LEDs your TV has. For example, if you measure 180v at the power supply board/LED driver and you have 60 LEDs, that’d be 3V voltage drop across each LED.
@@DustinRogersinMO Didn't think about that. Good ideal... I checked the volts and it's jumping from 123 ish to 153v. So in theory it's going to be the 3v then bulbs
@@frankgzell83 Did that end up working out? Have the same model Hitachi and just found this video. Thinking about go your route...
The speakers on the back aren’t as good as downward firing speakers, but they aren’t terrible
Hey! I have a Hitachi tv that powers on and the leds turn on and there is sound but no picture, how do I fix? Thanks!!!
t-coin failure. low cost repair
So what was wrong with it orginally?
Backlight didn’t work.
@@DustinRogersinMO So you found an open led?
@@irishguy200007 correct. A couple of them
Superb job.sir.thanku.very helpful.ste from UK,
Hitachi have very good quality image!
Where do they buy pannels?
Could you provide a link to where you bought that LED packet? Trying to avoid buying the 12 pack of strips for 60$..
OmniClimHazard I got them off eBay, but the repair only lasted about 3 months of occasional use before a different LED failed. I replaced that one and then the very next day a different one failed. I’d suggest, based on the age of the TV to replace all the strips because all of the original LED’s are at the end of their life. I ordered my replacement strips from shopjimmy.com
@@DustinRogersinMO Eh.. too expensive from that site. I found the single LED pack but should I get 3V or 6V? If they continue to fail Ill just trash the TV and will have wasted 8$ instead of 60$ haha :)
OmniClimHazard $60 is way cheaper than a new tv. They will continue to fail if you just replace individuals, but if you insist, this Hitachi takes the 3V LED. These are the ones I ordered. www.ebay.com/itm/TV-Backlight-LED-Diode-Hitachi-SMD-3030-3V-1W-CoolWhite-LED-10PCS-TLC-Philips-Yi/132385160906
@@DustinRogersinMO thanks for the help man!
OmniClimHazard the only reason I didn’t replace all of them from the beginning is that at the time, I could only find used strips. I couldn’t find new strips anywhere.
How did you determine that the led strips needed to be changed? I understand you maybe didn't see any backlight when turning on the TV. But is there a way to determine this before you go inside the TV to check this out?
Gabi Vazquez you have to measure the voltage output to the LED strips. If proper voltage is going to the LED strips, but they are night lighting up, then there’s either a bad led or a connector that’s come unplugged. Either way, you’ll have to tear it down to get to the strips. If you don’t have proper voltage going to the LED strips, then you likely have a power supply/LED driver issue. Watch at 2:00 how I tested the voltage output to the LED’s. I did this first before I tore down the TV. I just did it again for the video to demonstrate.
@@DustinRogersinMO Thank you brother, it sure as heck was at 266v so I will be doing this breakdown and installing new strips see how long it lasts.
@@DustinRogersinMO would you happen to know what could be the problem with a TV that has good back lights but no picture on the screen? TCon, power supply, and min boards are all clean and with no damage or burns or blown capacitors. It's got me stuck.
Gabi Vazquez what model tv?
@@DustinRogersinMO it's a toshiba 50" fire tv edition 50LF621U19
Nice work. Great video
De unde se poate comanda ledurile ???
Ladislau Bokor vezi linkul din descriere
@@DustinRogersinMO Multumesc
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I got this tv for free but, it has no picture and no sound only the blue light comes on for the power or red what ever color. Is it worth buying the parts to fix this TV? I already had to order the power cord and the remote so I am out like $15. I have seen all of the boards in a kit for $70 plus the IR sensors, and then the LED stips I think for under $50. How much did you pay for that little strip of LEDS?
DallasPilotCar it really depends on what exactly is wrong with your TV. Have you done any troubleshooting yet to determine what is the cause of the no sound or picture?
@@DustinRogersinMO I just checked the voltage from the connector that you are talking about and I read 188 volts dc. On the connector above it the red wire to chassis ground I read 267 volts. I tried doing the flashlight test and was not able to see the menu. I have the back off of the TV now but hae not gotten to the LEDs yet.
@@DustinRogersinMO I sent a reply already to this please read that one first. I am worried about bending the screen when I take the back off completely. Did you have suction cups. I am not afraid to work on this TV. Een if I had to spend another $100 it would be better than buying a brand new 55". I just wonder how long the replacement parts will work
DallasPilotCar with the back off, power the tv up. There are enough gaps that if the backlight is working, you should see light coming through the holes where the wire goes through the case. If the backlight is not working, it’s likely an LED strip issue as these are known for going out on these hitachis. IIRC the menu for this tv displays at the bottom of the screen if you want to try the flashlight test again.
DallasPilotCar how do you know the sound doesn’t work?
Hey Dustin once your checking the LED’s do have to have the tv connected?
abraham masalla when testing the individual LEDs you want the TV unplugged from the wall. You don’t want any power going to the LED strips.
Thanks for your reply brother so once I tested the board it gave more than 260 v but once i place the Multimeter I don’t get any lights on led.
abraham masalla abraham masalla if your meter is in diode mode, you need to make sure you put the positive meter lead on the + side of the LED. If you LED strips are not labeled, you may need to switch your leads and test both ways. I have fixed a TV that every single LED was bad. The thing I noticed on those was a little tiny black spot on the face of the LED. Every single one had it. Just a little tiny scorch mark, almost not visible to the naked eye.
Thank you i guess I was using a low quality Multimeter but did figure out if you have a 9v battery it powers it well and found one bad led. Thanks once again. I guess once i was pulling out the plastic cover it pilled off a little will that cause any damage once I assemble it back.
Dustin where u out of
naminsky missouri
Dustin Rogers I'm in Texas I'm trying to learn how to take tv apart and repair to bad your far away nice video
naminsky thanks. Usually getting the back cover off of most TV’s is just a matter of removing 10-20 screws. I usually google for the particular model of TV to see if there are any common issues. A lot of times you’ll find information on how to diagnose that particular issue on that particular model (or the same brand and model series of TV but a different size).
The badcaps(dot)net forums are a good resource to search. You may be able to find someone local to you on that forum that would provide hands on guidance.
@@naminsky he is not that far.i drive all over the US. Missouri is a hop skip and a jump
Please help
I have a 49 inch tv that outta nowhere I have no picture, no tv
Don't raise backlight at max. Leave it at 60% if you want your tv to last for at least 5 years
I have a Le55w806 Hitachi the back light flashes and goes out green light blinks 8 times. Can't seem to find the problem. Maybe you can help? Thanks robert
Have you checked the forum at badcaps.net yet?