Question about JVC GM-V42 42 in. Plasma Television

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Have a JVC GM-V42UG plasma monitor. The picture went off, and the red diagnostic lights came on. Top light flashes, middle and lower lights are solid. I already tried the "clean the vents" thing. The manual does not seem to address this specific configuration of diagnostic lights (top flashing, other two solid). Thanks!

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  • lt_john_ash Sep 29, 2010

    Thanks for your help. I'd hoped it would indicate something customer-fixable, but it is assuring to know that I am not calling a repairman for something that I could easily have done myself.



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This signals a hardware fault - more precisely it signals the fact that the power source is in protected mode because there's a short on one of its outputs.
To find out which actual part is the one that failed you must open the tv and test the power source with a voltmeter - the output which has a voltage much lower than the rated one (or even 0) is the one that powers the faulty part, follow it and test all the components.

Posted on Sep 29, 2010


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you need to check ur picture ICU. OR picture board

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My JVC Plasma GM-V42UG was displaying the self-diagnostic light pattern of blinking/red/red, now it will not power up at all. Any suggestions?

It is impossible to say without checking several components and running some tests. It is most likely a problem on the power supply module although it is possible that it could be the y-main, x-main, and y-drive modules. I would definatley let a tech take a look at it and give you an estimate. A lot of times there will be capacitors that will go bad on the power supply module that can be replaced that is fairly inexpensive. You can inspect the power supply yourself for bad caps if you want. The caps will be mushroomed or domed on top rather flat. You can google electrolytic capacitor if you are unsure what they look like.

Jul 29, 2010 | Televison & Video

1 Answer

I have a 6yr old GM-V42UB 42in Plasma monitor. Has been acting up and then picture went away totally, All 3 self diagnosis light in top left are one with only the top one blinking. Any idea what this...

the manual just states to call your local jvc dealer/repairman and tell him what lights are flashing and he can tell you the meaning of the code

it does not list the meaning of what you are describing just the meaning if the top and bottom flash while the middle is solid.

so dont be shy give someone a call even jvc but youll be better off with someone local

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i can fix it for 200.00 dollars u pay shipping or local delivery available.

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Nov 12, 2008 | JVC GM-V42UG 42 in. Plasma EDTV

1 Answer

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Power supply, or main drive board are the two most common problems in many of these sets.

You would be best to send the set to the authorized service rep. He will be able to swap out the boards for new ones to find the bad boards. Then he would be able to adjust the set with the new boards, and it would be fixed.

Get an estimate before agreeing to service the set. These sets can be very expensive to repair.

Jerry G.

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1 Answer

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That indicates an abnormal temperature rise in the power supply. These plasma TVs are board replacement repair only. The power supply board seems most likely would have to be replaced. I hope you have warranty coverage. It could get quite expensive to fix.


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1 Answer

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