Question about LG MZ-42PZ14 42 in. Plasma Television

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No power my lg 42px3rv turned off and wont do anything but there is power from the plug to the tv it just wont turn on.  no lights are on like the power is off.

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Re: no power - LG MZ-42PZ14 42 in. Plasma Television Flat Panel Televisions

Internal fuse?

Posted on Dec 28, 2007

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Perhaps replace your power cord. Borrow power cord from repair shop. If it works it's the cord. Also if the TV is plugged into power bar make sure the power bar hasn't been inadvertently turned off.

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Are you certain the replacement power supply is good? A defective main board or power supply can cause this problem.

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The tv power supply board is dying.That the board,where the power a/c acord plug into it.Tries websites like, to buy a refurbish power supply board for the replacement.

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My LG 50' plasma wont turn on. When I try to turn it on I hear a loud pop and it turns when I try to turn it on it just turns off. No sound. I tried to unplug it and plug it back in but the...

This seems to be a common issue with this model. Unfortunately, the TV will need to be repaired or replaced.

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No power, checked plug fuse ,fuse on power board now i am stuck what to check next

You need to do more indepth troubleshooting. Are you getting the any DC voltage in the primary AC side on the big cap(the one with 250~450dc rating).
Here are the service manuals that you will need:
You also should check Z and Y sustain boards.
You have to at least get the DC standby voltage (3.3vdc or5vdc) for the processor the minute the TV is plugged in.

Please leave rating if it helps. You may also want to look through some of the LG PLASMA TV training manuals (look at any one of them since the operation concepts are all the same).

Basic LCD monitor and TV troubleshooting guide:
Failed TV and Monitors:
Learn about bad caps:
Capacitors kit: he can make you a set of caps.
Or, just make sure to use caps with low ESR, 105c, high ripple current and long life rating such as PANASONIC FM or FC series.

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1 Answer

Tv wont turn on

Hello Charliebigwh, hi technically your monitor's power supply has a problem, this is either your switching regulator does not work or there is a short in that section, If you want to do it your self, need to replace all large value, and or high voltage capacitors(especially the capacitors with its top is bubbly), need also to replace the switching IC, and power transistor.

Have it checked by a technician if you cannot do the work.

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LG flat screen wont turn on. Ive tried unplugging from wall

The flashing light indicates the TV is in protection mode. Most likely logic board. Not sure what your model is but its usually the board that has your digital inputs in it ex HdmI etc. Post your model and you should get some one to post more info Ex ( LG XXX has a common problem with tuner board)

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You have a major problem with this set. Could be the main board, the Y-SUS board, or the power board or some combination of these.

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