Troubleshooting a Samsung UN48JU6400 TV with a red flashing light, but no picture.
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- เผยแพร่เมื่อ 23 ต.ค. 2024
- In this video we have a Samsung 48" Samsung 1080p LED Smart television, model UN48JU6400FXZA that powers ON but the picture never comes up. The television has a black screen and absolutely no backlight. However doing the troubleshooting procedures on this particular television is very simple. This also includes the Un55 and Un60, MU and JU series Samsung models in which the backlight will turn on and off repeatedly. Just start unplugging boards and it will lead you to the one thats bad. Unfortunately we troubleshooted this paticular tv all the way down to a bad LCD Panel
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bigdogelectron... - แนวปฏิบัติและการใช้ชีวิต
Parts, parts, parts, those suppliers love you guys and the parts cannon troubleshooting methodology. Most folks who attempt these repairs undoubtedly return the boards once the original ones are eliminated from being defective. There is a price for that too. Restocking, return shipping, plus original shipping costs add up quickly, close to $60, in this repair presuming you returned the un-need boards. In this set, I’m curious how you eliminated the driver board? it’s more likely than not that the LCD is NOT the issue.
Learning more about the power supply board from you guys today thank you keep it up
Very great tutorial. Just wondering why didn't you disconnect the led panel and check if the mainboard works and the t-con powered up? Is this a viable way to check if there mainboard works and t-con lights up?
This is great. But let me understand. If you unplug the cable from the main board to the T-con board, when you power up and don't get back lights, your main board is the problem?
Watching from philippines
Nice close up shots and tips 👍 drop this guy some 👍 👍 👍 and sub, I did. Keep em rolling.
Wonder what caused that?? Saw that on LCD tvs too. Not worth fixing.
We’re you able to fix this tv ? Or was it a bad panel? And could not be fixed? I have a 75nu8000f. Keeps rebooting and red light blinking twice. When I disconnect the ldvs cable the screen is purple backlight on but no home menu.
Use tape on the ribbons to the driver boards I have done a few and it works either the first 4 on the inside or the outside of the ribbons
Please explain. Thank U
bigdog8882
hi mate right the screen is blank, t-con and mainboard are ok, take off say the left LVDS cable and the screen shows half a picture put the left one back and remove the right and you get a black screen... fault is on the left side and the right is producing half a screen.
Start with some tape like 3 or 4 connection tracks of the lvds and place on say the left and put I back into the socket and check the screen, and if no change take tape off and move to the next 3 or 4 and keep doing so I have rescued a few TVs this way, a bit like removing the edge tab bonds on the duff side of the screen if you’re getting like slow motion on one side remove left then right lvds cable to determine the duff side then simply tear off the screen edge tab bonds that’s another one to remember 😊
bigdog8882 found this BD it may be easier then trying to understand my crap instructions lol
th-cam.com/video/pfrRhw7-ZII/w-d-xo.html
19.00 mins in shows how to get rid of a double image or if screen is jittering
th-cam.com/video/jx4qiSmMDU8/w-d-xo.html
bigdog8882 let me know how you got on 👍
Taking off edge tab bonds (cof) only take off ones from the faulty side do not remove both sides
Go to 1:15
th-cam.com/video/2VYR5LgVWzc/w-d-xo.html
You can still repair the panel in that situation, just use a tape method by blocking the clock signal ckv,ckbv1,ckv2,ckvb2 stvp
??????
I have been running into a lot of Samsungs with that issue. The last one was a UN70NU6900. It to did the same exact thing and it too turned out to be a bad panel. It's becoming more common in these series of tvs
if its a bad panel is there any fix or its junk ?
@BigDog8882 Does bad panel mean it’s not repairable? How so?
I have a Hisense 75R6E1 TV 75" TV. The backlights "flash" during start up, but immediately turn off. It has a picture using the flashlight test. I have no output voltage on the LED connections on the main power board. (94V output per board)
It has a label with HD750S3U71-L3B2\S0\GM\ROH 246789 on it, along withHL75JC22M9S119FNCP103, and I believe the replacement LED's are CRH-BX75S3U713030T14088BS and it states there are 14 strips.
The main power board has 4 Backlight LED outputs, and I am unsure how the 14 strips connect to 4 outputs, because when testing the backlights with a tester, I get about 74 volts on each connection to the LED’s.
Any ideas would be appreciated.
Hey there bigdog I learn a lot from your videos I down load then and keep them handy just in case I have a tv that goes down. I just wanted to correct you on one little thing that is you keep saying "legend" and that's not correct it actually Ledger. Sorry Ol boy. Stay Salty! :)
Excellent! Thank you sir.
I don’t know if you will answer but my tv did the same thing and I replaced the tcon board and it still doesn’t work I don’t know if the tcon board I bought was good because in bought it used on eBay what do you think
Leave the tcon and everything else plugged in and unplug the connectors going to tcon from the screen. If backlights come on then you got a bad screen.
@@bigdog8882 yes the two bottom connectors? I unplugged those and the screen light came on
Is there a way to fix that?
@@joemarz660 You can try the tape method on the one out of the 2 connectors thats preventing the tv from coming on. Theres a YT video by "Frugal Repair" on that.
@@bigdog8882 appreciate it I’ll look at it thank you
Usually u can unplug the the cable from the power supply and the backlights would come on if the backlight is good if the backlights come on then u know it's the mainboard
Hey Man! I’ve got a vizio e65-e1, the entire screen is flash and extremely dim. How can I fix this? Can hardly see the imagine, but what I can see (the loading symbol) is flashing and spinning
While its on.. go to settings. THEN PICTURE.
Auto Brightness Control, and choose Medium!!!!..... you can adjust picture mode, but it'll only keep the TV on with picture, if the "ABC" is on medium...
Hey thank you for the video
💯💯💯
Soooooooooo....Do you replace the panel OR toss the TV???????????
Hey Big Dog, where can I find a Video board (I have tried Ebay, Amazon and the Internet but I have not seen this board, I believe I am calling it the correct name, (the board at the very bottom of the TV that connects to the T-Con board). I broke the ribbon cable off the 2 boards on the right side. It’s for a Samsung Model # UN60J6200AF. Model Code# UN60J6200AFXZA. Thank You
so you have a bad panel. so its garbage? No fix?
Hi my tv is blurry and black on left side can u tell me which bord make that happen
Why is the backlight come while the Mainboard is disable...can you force on the power supply ?
This TV use's a Low (0v) instead of a High (3-5v) to turn on the Backlight and Power Supply. So when U unplug the connector It goes to 0 volts and Turns on PS.
@@bigdog8882 thank you sir
Is it normal when I disconnected the Mainboard from power supply the voltahe stanby 13 volts has Flactuate because of no Mainboard loaded?
Same tv. Backlights work when i unplug the main however i do have picture with the flashlight
My son has this same tv and now the screen is cracked on the inside if that makes sense. Meaning, he dropped tv during a moving situation but, the screen isn't cracked at all on the outside of the tv. It blinks 5 times when you turn it on and it shows a bunch of horizontal and vertical lines and then the goes black after the 5th blink.
Hello, I have the same exact tv here, problem is, tv doesn't turn on at all, when I plug it into the outlet the standby light doesn't turn on at all
Where can I order parts for my Samsung
Peace be upon you. This is a period that you did not publish a video for us. Good. We have benefited a lot from you in the field of reform. Is this television suitable or not? Thanks
I had one it was a bad panel I unplug the cables from the tcon to the panel and the tv csme on so it was a bad panel
Where are you grounding the negative lead? You havnt been cleat on that
Anything metal on the chasis. Unless your testing something on the Primary side of the Power Supply; then you have to use Hot Ground.
I thought command to turn on back lights comes from main board ? But backlights stayed on with main board unplugged ?
Thats because this TV uses a low instead of a High (+v) to turn on the backlights. Good question. I should of mentioned that in the Video. Thanks!
@@bigdog8882 Thx BigDog for your ans. Keep up the good work.
Big ups to you Big Dog you a great Technician
Did a 55” Samsung curve used a short killer (power supply) found a cap on the screen driver board I injected 3v @ 4 amps then felt along the driver board
Suddenly nearly took my skin off my finger lol removed the red hot cap and all ok £50 spent hopefully get £250 - £300
Just subscribe!!!!! I like your videos alot
Mine does that it blinks 5 times but my screen lights up
Too much for me