Question about Philips Magnavox 51MP392H Rear Projection Television

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TV no-picture Turn it on and just a click. I hear crackling. Removed the back and see acrhing in the end of the middle tube. The other two glow. I can see the arching inside end of the tube. Bad Tube? Want to know cost to see if this thing is trash or not. Thanks

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Hello cooperjason,

You may have a short between the grid and the cathode of one of your tubes. This is repairable if you happen to have a CRT tester. It can remove the short and allow you to balance the three tubes once you have repaired the problem. There is information on the web about how you can clear the grid / cathode short by using a charged capacitor across the grid and cathode pins of the CRT.

I would suggest, though, that you get a qualified TV repair person to do the work on this TV. Since the voltages involved are rather dangerous.


I hope this helps,

Thank you
Shuttle83

Posted on Sep 14, 2008

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the tubes each have a sealed wire delivering at least ten thousand volts to each tube===I have heard this before. likely what you have now is the seal they place where the wire enters the tube (2nd Anode) is arcing.

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The problem now could be in video amplifier circuits. Check the grid
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It appears that one of the CRTs has a short in it. It can be repaired with a CRT tester or with a capacitor charged up and applied to the grid and cathode pins of the CRT having the problem.

I would advise that you have a qualified TV repair Technician do this.

Thank you,

Shuttle83

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1 Answer

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