20 Most Recent Zenith Z50P3 50 in. Plasma TV - Page 2 Questions & Answers

These flat panel Tv's, all of them, sometimes have cheap Capacitors in the power supply section. They'll keep tv off and tripping relay circuits. It's not a fault in the power supply ic's, it's a fault in the main Capacitors. The IC thinks there is a leak, so it shuts down tv. It monitors voltages through comparators, and compares them to reference voltages. So check main power Capacitors and replace as needed. A lot of Chinese made Capacitors are cheap. In the big sets, they break down a lot.

Most likely buffer PCB

By thin line I assume its one pixel in width. A single pixel wide line is an indicator of a defective panel.

This is usually the power supply. It most likely will need to be replaced.

if it has only one fan, replace that but look to see if fan dusty or not.I have seen ones with two identical fans and one made noise and the other did not, swapped them and then knew for sure which was the bad one, in that case better to replace both fans at same time.

I would check for swollen capacitors on your power supply. If this is the case let me know. Can be a very easy and cheap fix. If you don't feel up to it, then just change the power supply, but that is pricey.

I see so many here with no sound/nopicture issues:ISSUES: 1. IF sound main fuse/s are good.2. If no power or standby check main fuse, standby power supply and any signsof damage you can see---burnt parts etc.3. almost all these sets the troubleshooting involves checking voltages on the main power board to narrow down theproblem.4. Be safe and if you do not know what you are doing don't open the set.Answers to issues:1. RE:fuses---if a blown fuse is found get a good replacement(not the genericones like Radio Shack). Many fuses are special even aside from amperage--Don'tput a higher rated amperage fuse in the set for any reason.2. RE: power supply in set: if total dead aside from main fuse the set uses astandby power supply that runs 7/24 and a main supply (some are combined andsome not.Here aside from checking fuses you want to examine all the filter caps on thepower/standby to see if any are puffed up or buldged up in some fashion--Iattach a photo of a good one---top should be silver metal and PERFECTLY flatand have no brown material coming out on top or bottom.What happens in the standby area is they use caps with too low a voltage rating(saves money) which causes them to fail in a year or two---the standby runs7/24 and the heat dries out the caps and they fail.3. Trouble shooting consists of the above and then at some point you have to buyand try a board to see if it fixes it or not.4. Safety first--no TV set is worth getting injured or even killed over.If set is opened at least look for puffed up and bad caps like in thisphoto.

This set is actually LG and have seen this question before on those--a quick call with the model number will give you the answer from Zenith--they are standard bolts available from Home Depot etc.