LG Plasma TV Model 50pg20 prower issue

[Quigz]

Hello everyone!!! First time posting something like this in order to troubleshoot a problem i'm having so hopefully it works out

Ok so here's my issue.
I have a LG Plasma TV Model 50PG20. I don't use it very often but one day I went to turn it one and it didn't work.

the first symptoms of a problem were:
- when powered on I heard a click and then a second click a couple seconds later.
- The red standby light was on and when powered on it turned blue and blinked 3 times then went solid. After a few second it turned red again.
- No light of picture or anything from the screen it self.

So after that I took the backing off and noticed on the Power supply board there were 5 bulging caps. No problem I replaced those without any issues and while I was at it I replaced all 4 fuses that are there too. one on each sus board and 2 soldered ones on the power board. But unfortunately there was no change. No because I don't really have any tools other than a screwdriver and a soldering iron I could not check any power or anything with a multimeter but I did disconnect the Y and Z sus boards individually and tried to power it up. That had no effect either.
When Everything is connected and powered on none of the boards heatsinks were warm to the touch either. not even the power supply board.

Sorry for the long post but I've tried many possible solutions that are in my realm of expertise which is very basic lol.

Any help is appreciated

[Quigz]

Re: LG Plasma TV Model 50pg20 prower issue

anyone??

[mmartell]

Re: LG Plasma TV Model 50pg20 prower issue

You need to get your hands on a multimeter, even a cheap one, and someone will walk you through taking some voltage measurements. From what you're saying saying sounds like the power supply but can't be sure just yet.

[Hamie]

Re: LG Plasma TV Model 50pg20 prower issue

This tv has a high fail rate on the power supply.
The repair kit is very accurate. Check transistors if any are shorted the kit will usually fix the supply.

Fuses 2 F101, 801
Transistors 4 Q601, 602, 801, 802
Capacitors 4 C202, 203, 204, 207, 218, 917
Integrated Circuits 3 U101, 701, 801


If you've never soldered before it's a pretty difficult repair.

[Quigz]

Re: LG Plasma TV Model 50pg20 prower issue

great, I'll go pick up a multimeter soon and it seems like those repair kits are pretty cheap so even if it doesn't work I'll be able to improve upon my skills.

Soldering I can do. Changed out the 5 bad caps that were in there already

Thanks guys I'll update the post once i pick up a multimeter

[rccrasher65]

Re: LG Plasma TV Model 50pg20 prower issue

I had this same tv, my problem was the upper buffer board. I also have the working power supply. When you get your MM. make sure you check you buffer boards, I ended up tearing the ribbon cable, set shot at that point.