Question about LG 42PC3DC 42 in. Plasma HDTV

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No pic but sound

Lg 42pc3d plasmano pic sound but no pic i took it apart and there is a blowin fuse i was told it is the hv board were is th hv board located and if so were can i buy a new one.....thanks

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  • Contributor
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My experience is that the Z-sus board has blown! . this because a little power supply on the Y-sus board is defective. This power supply feeds the drivers for the Z-susboard. replacing the Z-susboard will result in a working tv but it will allso blow sooner or later if the little powersupply on ths Y-sus board isn't repaired first! this little pwer supply, supplies the +15 volts for the gate drivers of the Z-susboard and if you measure on those gate-drivers you'll see that the supply voltage has dropped considerably due to bad elco's on the little power supply on the Y-sus board.

Replace those bad elco's first before installing a new z-susboard!

Posted on Jul 10, 2009

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I think you probably mean the Y-Sustain board which does have fuse which can blow. This board is on the left hand side (as you look from the rear of the TV). Occassionally other factors can be responsible for this fuse to blow such as the buffer PCB which works in conjunction with the Sustain board. An established repair service centre or a supplier on-line will porvide a replacement for you.

Posted on Jun 29, 2009

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2 Answers

What causes my tv when i push the power button to have the green light to blink 3 times than shut off


For this model it is usually power supply(look for popped or bulged capacitors) or YSus board(look for shorted components}

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From your description it sounds like your TV it's actually on you just can't see a picture. That is usually caused by your Zustain boards. The zustain boards are located on the left and teh right side of the TV. You can check the fuses to see if one of them is blown or you can leave it on and see if one of them does not heat up. You would have to replace the board. You can find part at www.interliquidparts.com

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it is going to be a failure of the Z sustain board if you can see dark video. you can either replace the Z sustain board or the IPM that is bad on the Z sustain. the board is about $175.00 or so part number is 6871QZH034 I THINK.

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This condition, sound no picture, is generally a result from a failed y-sustain and/or x-sustain board. You can check the fuse for continuity or resistance using a multimeter. I am helping someone repair their LG 42pc3d, that's why I thought I'd help you out too.

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replace display board.
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Jan 15, 2009 | LG 42PC3D 42 in. Plasma Television

1 Answer

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the z sus board is the board thats on the right next to the right speaker looking at it from the back, and you can get it at ebay cheap.

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5 Answers

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I know you already replaced the board, this is for future searchers. If you heard a popping sound, then the picture went out, there is a 32 pin Sanyo module that goes bad on the board. That's probably what caused the fuse to blow. Replace the module, then replace the fuse. The module is less than half the cost of a used board. Since this was a popular model TV, there are lots of replacement boards on the used market.

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