Hi,
I have a TV led LG that sometimes, starts and all is running ok and sometimes, don´t start immediately; sometimes (not always the same), could be 5 sec or 10 minutes later, it starts.
Measures: PSU - 3.5 V ST-BY is always ok but misses RL_ON from the uP. When it turns on, the 12V a 24V are ok too, so the PSU seems to be ok.
On main board I've checked that 24 Mhz crystal is ok, and uP generate POWER ON/OFF but RL_ON don´t.
On panel Led indicator is blue (on).
If the TV remain connect with mains 220V and Red led is light, the Tv starts but if disconnected from mains the malfunction appears.
I have schematic.
I have a TV led LG that sometimes, starts and all is running ok and sometimes, don´t start immediately; sometimes (not always the same), could be 5 sec or 10 minutes later, it starts.
Measures: PSU - 3.5 V ST-BY is always ok but misses RL_ON from the uP. When it turns on, the 12V a 24V are ok too, so the PSU seems to be ok.
On main board I've checked that 24 Mhz crystal is ok, and uP generate POWER ON/OFF but RL_ON don´t.
On panel Led indicator is blue (on).
If the TV remain connect with mains 220V and Red led is light, the Tv starts but if disconnected from mains the malfunction appears.
I have schematic.