Lg 32lh30-ua

[Syryll]

Having issues getting this set to start and run after changing the backlight brightness. I was having issues with it not "cold" starting after a power outage, but I was always able to get it to start after the second power on attempt. When I turn the set on, it attempts to turn the backlight on (I get 1/4 second or so of backlight) and then it shuts down.

PSU voltages read as follows:

24v: 21.88v
12v: 10.86v
5v: 5.12v

Under "first start" condition, 12 and 24v only read at around 1.5v and I have to restart the TV to get the voltages to come up to the respective 10.86 and 21.88v.

[michael dranfield]

Re: Lg 32lh30-ua

You need to check the voltage across the main reservoir capacitor it should rise to about 385v when the set fires up , if it does not the PFC circuit is not working and it is more likely to be surface mounted resistors fallen in value , I dont have the cct ref but they are easy to find on the back of the board there will be 3 0r 4 all in series from the reservoir capacitor to the PFC control chip, they will be something like 600 Odd K ohms from memory and there value is critical to the working of the set.

[Syryll]

Re: Lg 32lh30-ua

I actually did test those two caps. They both read 220v. I'll check that out when I make it home.

Thanks!

[ReeceyBurger123]

Re: Lg 32lh30-ua

Try heating the Psu with a hair drier see if the Tv comes on faster my bet is a bad startup cap.