Hello Team,

I'm back with another backlight issue that I thought was simple, but it turned out to be more complex than expected.

Let me provide a brief history: The TV was working well, then one day, the backlight started and shut down. I thought I had an LED issue leading to this behavior, so I replaced the LEDs with brand new ones. However, the issue remains the same.

Next, I replaced the electrolytic capacitors attached to the LED power supply, but the results were the same. I then replaced the driver, a OB3365RP, and did it twice due to the same result....

Hello, got an iPad Pro A2378 12.9 5th gen with no backlight. Got another test unit without screen, tested the screen, still no backlight with the test unit.
Figured out the backlight on the screen was bad, ordred a new backlight from mobilesentrix, *carefully replaced it* without damaging the lcd, oh well.
Final result, issue is still there, the screen has no back lights. So i'm back to square one, with 3 hours less and 100$ out, issue still on the screen.
The panel is still ok, i can see the apple in the middle of the screen when it kicks in, just no backlight.
Anyone...

Hello to all members of badcaps.

Another brainstorming that i have been messing with for months as a side project.
Bought a T540p , from eBay as 'doesn't display' ,so i thought it was either backlight fuse, or screen issue etc.

I got it in my hands, first thing, the machine works fine boots to windows , in external screen all diagnostic are good.
Step 1.
Change screen (FAT - LED ) 1366x768 to 2nd one, that i know 1000% that is working ,as it has been tested.
Machine > Doesn't give display it's really dim.
Step 2.
Use the same...

TV philips 55'' no backlight (image ok).
I tested the backlight with my led tester from the unplugged connector cable and it lights up. I had voltages at the motherboard connector, but anyway I order a new psu. Same problem, same voltages. Disassembled the TV and checked every strip with my led tester, they all light up, same voltage for every pair of strip (they go two by two).
What am I missing?

And something else I don't understand. I checked and I have 3v Leds, 10 per strips. Why every pair of strip (so 20 Led) take about 32v when powered up with my led tester 🤔

Hello team,

I'm back with another topic.
It's a 65C715 TCL tv with backlight issue.

But the problem is a bit strange.
When I took this tv from the marketplace backlight didn't work but picture was ok.
Back at home I checked with led tester if led are alive and I can find something different in term of voltage supply => nothing

Putting all back together the tv worked fine for weeks. => Contact issue??

Few moment later the tv has started to have backlight issue back, turning off and on worked sometimes and tv was working....