Toshiba 50UL4B63DG faulty screen?

[sigmeyer]

I got this 50 inch tv the screen starts off with almost nothing visible but the top part of it , and it would slowly kick in and the picture would be visible , but then over time it would go greyish with the top of it mostly intact. I did have instance where the screen would be fucked like that and i would touch the cpu and memory to see if it would react and a couple times it would screech on the speakers and restart. After that it would show a better picture somewhat but afterwards i touch the cpu and not much is achieved. Im wondering is this a screen fault or should i pursue this with a donor board and see if that fixes the issue?

[sigmeyer]

Here are the pictures

[tiki66]

This is a screen fault. Screen manufracturer is Panda and they die alot. Woudn't recommend wasting your time on it

[yokoono]

Take the cover off and take pictures of the inside.

[sigmeyer]

I changed all three flat cables , and that's ruled out , at this point I'm pretty certain it's the screen fault

[sigmeyer]

I'm gonna dump the firmware and upload it to the Russian remont website if anyone ever needs it

[yokoono]

You can't save the software from the TV. At most, the memory dump. Disconnect the 2 lvds cables one by one and see if the image is correct on the remaining cable.

[yokoono]

Also measure these voltages on the t-con and post what values you find.

[Davi.p]

99% is bad cpu contacts, do not trash the TV! If you can grab a compressed air can or freeze spray , freeze under the cpu when in working state with bad video out, if you see substancial improvement you can add the 1%

[tiki66]

I changed all three flat cables , and that's ruled out , at this point I'm pretty certain it's the screen fault

Oh yeah it's a Panda panel, trashed more than 1000 of them, don't waste your time

[sigmeyer]

VGL - (-6v)
AVDD - 15,8v
HAVDD-7.5v
VCC3v3 -3.3v
VCC1v8 - 1.8v
VCC1,2v - 1.2v
VCOM_L / VCOM_R - 7volts

Tried freeze spray when screen goes to crap , no change , tried freeze spray on tcon aswell , no change.
when i plug in only one side , either i get nothing on screen or just same crap as before , tried the tape trick on all pins , both lvds didnt do much either.... At this point im really sure its just trash screen

[sigmeyer]

Also in Service menu it says it has 600k im assuming minutes on time , i think this tv was on its whole life, 10000 hours is crazy , maybe not i dont know... ehh , this is going in the parts bin... It even has a energy sticker on the back from the stre , looks brand new too... I got this TV out of a business so it was probably in the store front or lounge...

[Davi.p]

No, i don't endorse the idea of bad panel, try a reflow to the processor, the spray trick is not effectivc'''e 100%, there's no other reason why pressing the cpu makes so much difference.. c'mon, another bit of enforce..

[Diah]

50 Panel are rubbish, try mask tape the first 2 pins as it marked