I picked this set up today. The red LED on the front was lit in standby and there was the correct 3.5V at pins 9-12 on the PSU. I found that the main would send the signal to power up (3.5V at PWR-ON and DRV-ON) but the PFC booster would never come up. The voltage at the main cap would drop from about 165V to 162V when the set was trying to turn on. In the end it turned out to be the MUR460AX diode at D607. It was shorted. I had a very similar PSU out of a 42" LG 42LM3700 that gave up the same diode for testing.
Here's the datasheet...
And a couple pics cause I know you guys like them.
Here's the datasheet...
And a couple pics cause I know you guys like them.
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