LG Plasma (42PC3D-UE) question

[notv in toronto]

I have a LG 42 inch plasma TV model 42PC3D – UE that just stopped working. The small red light is on at the front, but when I turn it on, it immediately shuts off. I get the green light for a split second. I tried unplugging it for a while, with no luck.

It's about 4 years old. I noticed some other people (on the board) had sound issues first, but not me. It just stopped working out of the blue, with no prior problems.

Any ideas on the problem? Is it worth fixing?

I'd appreciate any advise. I just don't want to waste a day lugging it around town to pay someone to tell me is broken.

Thanks in advance.

[PlainBill]

Re: LG Plasma (42PC3D-UE) question

I have a LG 42 inch plasma TV model 42PC3D – UE that just stopped working. The small red light is on at the front, but when I turn it on, it immediately shuts off. I get the green light for a split second. I tried unplugging it for a while, with no luck.

It's about 4 years old. I noticed some other people (on the board) had sound issues first, but not me. It just stopped working out of the blue, with no prior problems.

Any ideas on the problem? Is it worth fixing?

I'd appreciate any advise. I just don't want to waste a day lugging it around town to pay someone to tell me is broken.

Thanks in advance.

Possible shorted Y-Sus or Z-Sus. The Z-sus is on the right as you stand behind the set. Unplug the heavy power cable from the Z-sus, and try the set again. If it powers up, but no picture, a new Z-sus will cost about $100 US. That's about $50 Canadian, I believe. If it doesn't power up, reconnect the first power cable, and try the same on the Y-sus.

PlainBill

[PlainBill]

Re: LG Plasma (42PC3D-UE) question

On second thought, there may be a better way to troubleshoot this. With the TV unplugged disconnect the heavy power lead from the power supply to the Z-sus board. Notice there are two ceramic fuses next to the power connector. On the upper fuse, measure the resistance from ground to the end of the fuse furthest away from the power connector. Repeat for the other fuse. If either resistance is less than 10 ohms, you have a short. If neither are shorted, reconnect the power cable and report the reading. Now disconnect the power cable going to the Y-Sus card and perform the same tests. Again, if neither are shorted reconnect the power cable and report the results.

The next test will require a little more care, plus some help. The outputs of the power supply are labeled on the supply itself. Set your meter to the 200 VDC range, hook it to one of the outputs of the power supply, and have someone turn on the TV. Does the voltage reach it's designated value? If it does, go on to the next output. If it doesn't, you may have a bad power supply.

PlainBill