LG 42PC3DC Turns on, then back off

Jeremy112

Member

Join Date: Sep 2012

Posts: 18

Country: USA
#1

LG 42PC3DC Turns on, then back off

09-10-2012, 10:40 AM

Hello to all Badcaps! I've been roaming the forum unregistered form some time, and its helped to fix a few TVs indeed!

I have an older LG 42PC3DC 42" plasma, that turns on, then back off.

I KNOW its the power supply, since I took the good power supply from this TV, and put it in another LG plasma that I had.

I did that because THIS TV has one more problem, which at the moment I wont get into because I must first make this TV turn on and stay on before I can fix the other issue.

Anyway, what on the power supply board would be bad. It IS NOT capacitors, they have all been replaced and the same exact issue is still there, the TV turns on, then back off.

Nothing looks fried, no bad fuses or micro fuses or any of that.

So Any theories? I greatly appreciate the help!
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tom66

EVs Rule

Join Date: Apr 2011

Posts: 32560

Country: UK
#2

09-10-2012, 11:02 AM

Re: LG 42PC3DC Turns on, then back off

Check the AC-DETECT pin - should be stable 5V or so, if it drops out that is your problem.

Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
For service manual, schematic, boardview (board view), datasheet, cad - use our search.
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LG 42PC3DC Turns on, then back off

LG 42PC3DC Turns on, then back off

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