Did you check the service manual's troubleshooting flow chart?
Nod to main board or panel.
I'm trying to identify the cause of the "photo negative" screen that is now on my Samsung LCD, model LN37A550P3FXZA.
So far I have:
- Replaced power supply board
- Check capacitors, they are all good
- Ran electrical tape underneath the circuit boards that may have been touching metal pieces
- Cleaned out any dust
I am wondering if it may be the T-Con board or the actual LCD panel that needs to be replaced.
If a T Con board is bad, will the screen give the "photo negative" appearance?
Any help and tips would be greatly appreciated!