Hi,
I'm new to this forum, so this is my first post. I have an LED TV LG Model 60UH8500 that stopped working suddenly. The standby LED is on, but when I try to turn the TV on either using the remote or the power button on the TV, the red standby LED blinks 3 times, but nothing else happens - the TV screen stays dark, no picture and no sound.
Here is what I did so far... I removed the back cover and checked both the power supply board and the main board for any obvious visual cues such as burnt diodes, bulging caps, etc. Nothing observed. I checked 2 fuses - GOOD, tested all capacitors and diodes that I could - found nothing. I also tested the voltages at the following spots:
In Standby mode:
12V: 7.8V
24V: 0V
POWER_ON: 0V
DRV_ON: 0V
LED+: 43V
After turning on:
12V: 11.9V
24V: 24.8V
POWER_ON: 3.1V
DRV_ON: 0V
LED+: 63.7V
With the back cover removed I could observe that after 10 seconds or so after powering the TV on the amber LED on the power supply board LD701 blinks 5 times then off for about 5 seconds and then blinks 5 times and it repeats indefinitely. I think it's some kind of error code, but I couldn't find anything that would explain or narrow things down for me.
I'm trying to narrow things down to either a power board, a main board or something else, to see if I could fix this or not. Any help with what I should test next would be appreciated.
I'm new to this forum, so this is my first post. I have an LED TV LG Model 60UH8500 that stopped working suddenly. The standby LED is on, but when I try to turn the TV on either using the remote or the power button on the TV, the red standby LED blinks 3 times, but nothing else happens - the TV screen stays dark, no picture and no sound.
Here is what I did so far... I removed the back cover and checked both the power supply board and the main board for any obvious visual cues such as burnt diodes, bulging caps, etc. Nothing observed. I checked 2 fuses - GOOD, tested all capacitors and diodes that I could - found nothing. I also tested the voltages at the following spots:
In Standby mode:
12V: 7.8V
24V: 0V
POWER_ON: 0V
DRV_ON: 0V
LED+: 43V
After turning on:
12V: 11.9V
24V: 24.8V
POWER_ON: 3.1V
DRV_ON: 0V
LED+: 63.7V
With the back cover removed I could observe that after 10 seconds or so after powering the TV on the amber LED on the power supply board LD701 blinks 5 times then off for about 5 seconds and then blinks 5 times and it repeats indefinitely. I think it's some kind of error code, but I couldn't find anything that would explain or narrow things down for me.
I'm trying to narrow things down to either a power board, a main board or something else, to see if I could fix this or not. Any help with what I should test next would be appreciated.
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