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Never had one that wasn’t backlight related. You are right about them being sensitive to change though. These Sonys use a specific led that powers at 12v. Not the typical 3v or 6v led. When they start to fail they can draw a little too much current or just under 12v and cause the error...
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In terms of troubleshooting you are correct and Sonys manual states that as well. Sony only tries that because the tech can change the boards. They never tear apart and replace backlights. They provide new panel with backlights and reinstall your old boards or replace tv altogether
However I have fixed a lot of these Sonys and never had ld board be bad. It’s always the backlights...
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Anyone fix this issue before???
I have this Samsung QLED tv that works but has a vertical stripe. I know its most likely the cof chip but curious if anyone has successfully repaired one?...
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It’s definitely the main board. Test the caps in ohm mode around the big BGA chips. Which ever chip has the low ohms caps near is the problem.
you can try a reflow for testing but my experience with this model lg is you have to replace it. I’ve never got a reflow to work
you can buy the chips but they come from China so takes a while to get and need BGA workstation.
Mainboards are getting expensive and almost impossible to find for this model though and will just have the same fate
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Jumpering is to determine which side of the lcd screen is bad. You don’t have the lcd screen in so this is not relevant to you at all.
unplug main board from power supply and leave the backlights connected to power supply. Plug tv in and if power supply and led lights are good they should light up.
if not double check you ordered correct leds. Then you can unplug led from power supply and read voltage output on the led pins. Report back all findings after performing these test.
also your pics never posted
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Be careful with that. Most screens now have a coating for glare purposes and that will remove the coating making it worse. I know as I have tried.
sometimes you can use an eraser the the old pink square ones and lightly rub it. Sometimes it works but usually helps make it less noticeable if nothing else...
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Yep, Hisense and tcl TVs will turn off if just 1 led is bad.
some Sonys do this also
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With the test points connected I get no picture with either side of the lvds cables disconnected. Just some vertical lines and a green blob. Same for both TVs.
Tried covering the ckv lines and same result also.
any other ideas or suggestions before I scrap both
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UN55LS003 panel help
I have this tv, actually I have 2 with same symptom. Turn tv on and it shows to connect one connect and then vertical lines and colors appear.
pretty sure it’s the panel but don’t see the 2 points to jumper together to see which side of the panel it is to start with. . Anyone had this model and problem before. Any insight?...
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