Sony Bravia KDL-37S5600 inverted color and flickering

[LINCKODE]

Hello!
I have a Sony Bravia(the specific model is in the title) that is exhibiting the following behaviors:

- Color inversion on the whole screen(or rather it has trouble displaying gray and black correctly)
- Static-like flickering on the dark parts of an image(it will flicker between black and white on some dark parts of an image)
- Bad image detail/sharpness

These issues switch between each other from time to time.

After consulting some online resources and the LCD TV troubleshooting guide I found on this forum, I believe I am looking at a bad TCon board, or rather, the gamma chip on it(AS15-HF).
Before ordering a replacement chip or the whole board altogether I wanted to hear the opinion of someone with more experience.
Is my assumption that the TCon is at fault for these behaviors? Or could it be something else entirely?

[nomoresonys]

Re: Sony Bravia KDL-37S5600 inverted color and flickering

I think you are right on the money with your assessment.

[R_J]

Re: Sony Bravia KDL-37S5600 inverted color and flickering

You can check the voltages on the VG1 ~ VG21 test points, write down the test point with its voltage, this voltage should be linier, if one or more seems out of place the ic is likely bad.

VG1 = ___
VG2 = ___
VG3 = ___
\/ \/
VG20 = ___
VG21 = ___