Any idea what is wrong with my Dell 2408?

[momo]

Hi,

can anyone explain what could be causing the problems you can see on the attached picture? I get that weird lines and stripes - but if I attach the TFT to my PC I can see the normal output but with the defects you can see on the picture overlayed. The 3 brighter vertical areas are flickering heavily, the darker problematic areas in the upper half consist of red, green and blue lines but strange enough, the black areas in the bottom half are completely fine.

I checked the innards of the TFT but couldn't see anything unusual... any idea?

Thanks,
momo

[selldoor]

Re: Any idea what is wrong with my Dell 2408?

Did you just turn it on one day and it was like this ?

First idea would be to remove clean and reconnect all removable cables including the one between the main board and the panel. If you move that while the panel is on
does the pattern change?

[momo]

Re: Any idea what is wrong with my Dell 2408?

Thanks for the fast reply! I don't know how that happened. I got this TFT from eBay with only the power LED going green when pushed, so I thought the power supply failed. I then opened it and found fuse 001 (inverter board) missing. I soldered in a new one and now it powers on but obviously that wasn't the only problem...

I tried removing and reconnecting the cables, but that didn't help. If I move the cables when powered on the pattern doesn't change.

[selldoor]

Re: Any idea what is wrong with my Dell 2408?

Its beginning to look like a bad panel

We can sometimes help a lot more if you please post good clear pictures of the whole chassis, and then pictures of each board, front and back (in the same orientation) and close up of connectors, (max resolution 2000x2000 and 2MB) using the manage attachments button, which is found by clicking "go advanced" under quick reply.

Please do not post inline and offsite as they slow down the loading of pages.

Examples of what is needed

https://www.badcaps.net/forum/attach...7&d=1280167246

https://www.badcaps.net/forum/attach...6&d=1280167246

https://www.badcaps.net/forum/attach...4&d=1280167246

It will be useful if you can say = a bit about yourself - skills tools etc.

[momo]

Re: Any idea what is wrong with my Dell 2408?

Well, I took some pictures of the boards. Any chance, the problem is caused by the signal board or does it really look like a damaged panel? I've never seen such a pattern before...

Thanks,
momo

[momo]

Re: Any idea what is wrong with my Dell 2408?

To answer my own question: The problem was a defective panel driver chip. I ordered a replacement board at BuyQual and that worked like a charm.

[y_not]

Re: Any idea what is wrong with my Dell 2408?

Excellent thank you for the update!
But may I ask how you went about determining the fault?

[momo]

Re: Any idea what is wrong with my Dell 2408?

Well, to be true, I kind of guessed :-) I simply didn't believe a panel itself can be break in such a way and since the main/signal board was still able to get an "image" out of whatever input I attached and the power supply board obviously worked (and a defective panel driver seemed to make sense), I simply ordered a replacement for the remaining board and that did the trick.

Cheers,
momo

[gti]

Re: Any idea what is wrong with my Dell 2408?

Hello Momo and all .... need some help here.
My 2408WFPb also displayed the same problem patterns.
Can you clarify which board you have replaced as I am not sure where the panel driver chip you mentioned is located.
Any chance it is the T-Con board that you have replaced??
Thanks for helping.