Sony KDL-46Z4100 color distortion, possibly T-con?

[S65]

This is my first attempt at repairing a TV and it looks like i already messed up

The TV's colors are distorted and yellowish.Picture kind of looks grainy if any.All inputs work and so does sound.I went over PSB with my DMM and no bad caps and everything checks out in that area.I'm guessing the mainboard is good because the picture work and the sound also works.

Looks like this but a bit grainier:

https://www.youtube.com/watch?v=DJOIvmXD2P8

The previous owner told me i was most likely the T-con board, i'm leaning towards this as well.

Here's what i've tried so far until i messed up the t-con board:

Reseating all cables

Pushing down on the panel tab joints on the top to check for any loose connections

The problem has got to be the t-con or the panel itself.The video i linked suggests it's the gamma chip that has gone bad.So i tried resoldering it to see if that would help.Ended up ripping 3 copper traces as i didn't expect the pins to be so fragile and now the t-con is compromised.The part # is T400HW01 V3 or 40T02-C04.I've been trying for find this board but they are from china in the 130$ range.I also found another t-con for the same model TV with a very similar layout.Its part # is 1-877-777-11 and it says my TV is a compatible model.

Here is the board i currently have:
http://www.shopjimmy.com/sony-55-46t...-con-board.htm

Here is the board i want to get:
http://www.shopjimmy.com/sony-1-857-...-con-board.htm

So my question now is, are these two t-cons interchangeable or would it just be worth a try? Same model different part #. i'm guessing the latter board is newer?

Or is the t-con even the problem?

Also i notice that the light coming through the back panel holes is yellow with the exception of a few white in the top and that is with the t-con out .

[ozzy214]

Re: Sony KDL-46Z4100 color distortion, possibly T-con?

If the light is yellow, then perhaps you have bad ccfl bulbs. Or the tv is from a smoker and the tv is filled with nicotine! I had tvs that had discolored picture and the bulbs were bad.

Way I discovered it is I put the tv on a black screen. And I could see dark bars through the screen from left to right where the bulbs were bad and very dim compared to the rest!

[S65]

Re: Sony KDL-46Z4100 color distortion, possibly T-con?

Here is the panel image from the back


You might not be able to see the difference but the light coming off is yellow but the middle where the tcon sits on has white light. The whole back panel should not have any yellowish light at all, instead white. Correct?

[ozzy214]

Re: Sony KDL-46Z4100 color distortion, possibly T-con?

I tend to concur..should be white..not yellow