Model UN55FH6030 UN55FH6030F UN55FH6030FXZC

I had previously encountered this model with failed backlights. This TV had different symptoms and the backlights were working but with no video. The usual suspect when there is backlight and sound but no video is the tcon board. The TV appeared previously repaired since the main board was from the 65″ version of the this TV. I still had the other TV so tested the 65″ main board on it and it was working fine. I couldn’t swap tcon boards since the panels were different even though it was the same model.

Searching the tcon part number BN96-27249A found repair kits indicating it had a common fault. Used boards were actually cheaper than the repair kit and only $12 USD from Electroparts online.

The replacement tcon worked and fixed the TV.

The backlights appeared good. I checked the backlight setting and it was in standard mode with a default level of 12/20 on all inputs. Though not the problem in this tv, It does appear running the backlights at 100% is what causes failure.