Sanyo dp42848 - T-Con or LCD Panel Problem?

[abbottdave]

I have a Sanyo DP42848 with a picture problem. With the original T-CON I get no image on the screen, and with a replacement, I get what you see in the attachments.
I'm thinking T-CON because with the new board, I at least get something. I've checked all of the tab bonds, and nothing changes when I apply pressure.
Is it the panel or the T-CON?

[ReeceyBurger123]

Re: Sanyo dp42848 - T-Con or LCD Panel Problem?

Looks like panel/tabs to me it is common on this model.

[CapLeaker]

Re: Sanyo dp42848 - T-Con or LCD Panel Problem?

There are 2 ribbons going from the T-con to the LCD. Disconnect one leave the other connected and retest. Then the same thing again with the other ribbon disconnected and the first one plugged in. See what happens to the screen.

[dick_barton]

Re: Sanyo dp42848 - T-Con or LCD Panel Problem?

You can download the manual from
https://www.manualslib.com/download/...o-Dp42848.html

[abbottdave]

Re: Sanyo dp42848 - T-Con or LCD Panel Problem?

Here's is what I have now. From the front of the TV, with the left side ZIF ribbon cable disconnected (affects right side of screen) Image4. With the right side disconnected, Image5. With both connected, Image7, but then, Image8. I've lost the image altogether.
One thing I forgot to mention is when I had an image, the right side of the screen was really 'slow'. That is, the image would linger and fade slowly away. If you had it just showing 'no signal', the 'no signal' image would jump around the screen normally, but when it was on the right side of the screen, it would fade away really slowly. On the left side of the screen, it would blink out quickly. I know the TCON is responsible for 'timing'. Does that indicate a timing problem? Also, the main IC in the TCON is getting too hot to touch.

[petehall347]

Re: Sanyo dp42848 - T-Con or LCD Panel Problem?

try freeze spray on t con chip

[CapLeaker]

Re: Sanyo dp42848 - T-Con or LCD Panel Problem?

I am not convinced that this is a tcon problem yet. You may have a bad tab bond on the LCD itself. That also can explain the low refresh rate. Squeeze the frame firmly where the affected area is. You may have to take the TV apart and get at the individual tab bonds. Also youtube "tab bonds" etc.

[vinceroger69]

Re: Sanyo dp42848 - T-Con or LCD Panel Problem?

these two links may give you some idea what to check etc
https://www.badcaps.net/forum/showthread.php?t=25371
https://uselessforums.com/threads/ar...-issues.13670/

[dskall]

Re: Sanyo dp42848 - T-Con or LCD Panel Problem?

Might try watching this. Will help to described what bad panel looks like
https://www.youtube.com/watch?v=IZQRVqtIfns