Question about LG 42PG20 42 in. Plasma HDTV

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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

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  • benny11415 Mar 18, 2009

    My tv was working fine last night and when i turned it on this morning, it had a black patch with red dots (or snow) going horizontally across the hole tv. I had just purchased this LGPG20 42" 2 months ago.

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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. 

Posted on Feb 21, 2009

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