Question about LG Z42PJ240 42 in. Zenith Plasma TV
I have an LG made Zentih Z42PJ240 plasma set that I purchased used as having no picture. I opened the set expecting to find bulging caps on the PS or Y sustain board - but there were none. Brought up the set, and it worked, excellent video, for a little over 30 minutes - then protection shut it down. Noted some warm caps on the PS board, but not hot like there was a major current draw issue. Used component cooler on heat sinks and caps.. eventually the set came on and has run for hours without a shutdown. I suspect a cap is beginning to fail - but I hate "hanging parts" outside of preventative work, yet I also can't see pulling caps and testing them one by one. Yet at the same time, I see LG used very low-grade caps throughout. I am keeping this set, so I have the time to flush out the problem. What would you do? Replace, or at least pull/test caps that were warm - or just replace questionable junk with good grade parts?
You maybe have problem with smd resistors on PSU around 380v capacitor they are ned to re- solder it is on the circiut where is made this voltage -380v in primary
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Posted on Jan 02, 2017
This is almost certainly the device that sends electricity to the the plasma in the panel after failing. Bring to your local repair shop and expect to pay 300-400 parts and 100-200 labour.
Posted on Apr 28, 2009
NO....You must pay attention to all numbers on the back of the TV. Verify these with your tech or contact your LG customer support for the correct board numbers. If the screen was broken I doubt if you can repair this for less than it cost to replace. The screen for this one runs at about $650.00. Good Luck and good advice!
Posted on Oct 01, 2009
Check to see if you get Va and Vs voltages from the power supply. There should be some wires running to the y-sus. A couple of those wires will be labeled va and vs. Are they present? There will be a sticker stuck to the panel somewhere telling you what they should be.
Posted on Mar 26, 2010
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