Question about Zenith P42W34P 42 in. EDTV-Ready Plasma Television

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IS THERE A REPAIR FOR MALDISCHARGE - Zenith P42W34P 42 in. EDTV-Ready Plasma Television

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Yes there is, you have to replace the Y-sustain and the Z sustain boards.
good luck

Posted on Jun 18, 2009

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Posted on Jan 02, 2017

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MY LG LP1111WXRY1 PORTABLE DOES NOT BLOW COOL CONTINUOUSLY. IT BLOWS COOL FOR 60 SEC THEN IT QUITS. WHAT CAN I DO WHERE TO TAKE IT IN COLORADO FOR REPAIR?


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Hitachi hd1080


Model? what if any lights on front of set come on? If total dead unplug and look for fuse connected where power cord enters set, as much as I can suggest without more info.

Jul 20, 2013 | Televison & Video

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My 42 inch tv wont turn on model nu 42pfl5603d/10


what you need is trouble shooting and a good digital tester to fix that problem. since the problem is power off start at the back light check if their is a small maldischarge at the module then check if their is a click on relay and then if the front LED is turn from red to green. then check the power supply if normal, check the low and high voltage except the stand by supply. then check the Y board the Va and Vs supply look for the blown fuse. and then the Z board check the 5v and Va supply, check also blown fuse.

Apr 28, 2011 | Philips Televison & Video

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My 50" lg plasma has


first thing you you need to do is open the back cover for trouble shooting. then check the normal connection of all the connectors and then look for the back light if their is a maldischarge from the module.disconnect all the connectors to isolate excessive voltage. turn on the tv and check the Y board if normal the Va, Vs, -Vy and Vsc voltage are all present.the same thing with the Z board the Vzb, Vs and Va voltage if normal,check if no blown fuse.there are FET at control board check the 3.3v, 1.8v and 5v.be careful always especially in performing voltage checking.

Apr 26, 2011 | LG Televison & Video

1 Answer

I have a LG 42" plasma and I get a lot of red dots in patches when the screen turns black. Does anyone know why this happens thanks


This is what is referred to as a Maldischarge problem. It seems to be a fairly common problem on plasma displays.

This is caused by a few things but mostly it's either your Y-Sustain or your Z-Sustain boards and usually it's your -VY, your VScan and your ZBias voltages. 

If this is covered under warranty just get a tech to fix it. If not, let me know and I can give you some good instructions on how to try to correct this yourself, however it does involve opening up the TV, use of a digital multimeter & osciloscope as well as a small phillips screwdriver, some time, patience and you do run the risk of making it much, much worse if you're not careful. 

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There looks like theres something wrong with your drive.
The flashing one red light means that there is a hardware fault. I would of done the same testing procedure as you did, unhook parts to see if you can find the culprit. The dvd drive will need replacing as be the case something on the dvd drive's board may have shorted.

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