Question about Philips Magnavox 51MP392H Rear Projection Television

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No power TV was working fine then lost picture and sound no power would not turn back on replaced fuse closest to cord now power button lights up but still no picture or sound any idea's ?Thanks

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  • Anonymous Jan 01, 2008

    philips magnavox 51mp392h/17 rear. power light up,no sound, no picture........please help

  • m_tenhet Aug 23, 2008

    I just got this tv. When we turn it on, the power light comes on, but there is no sound or picture. could someone please give a little better desription on what I could possibly do to fix the problem? There are 3 red wires that run the lamps, one was plugged in and the other 2 were not.We plugged them and still nothing. Would appreciate any and all help. Thank You. Shane

  • Anonymous Feb 09, 2009

    power light comes on but no picture or sound. model 51mp392h . was working perfectly. appr. any help thanks



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Brand, and size please? Most problems come from either the power supply, or deflection circuits.

Posted on May 27, 2007


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Our Proscan TV was working just fine then suddenly just lost power, there is power in the cord but the light won't turn on, is there a reeset button or fuse?

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I had the same problem. In the menu, the image button was grey, and could not be hi-lighted, and the screen stayed blue. I was using the AC power cord. I plugged in the DC power cord instead, and it "woke" the unit up. I switched back to the AC power and it works fine. If you don't hve the DC cord that came with the TV, try andy 12 volt dc output cord with a positive tip.

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No Picture, No Sound While Watching

Resetting the TV
If the buttons on the remote AND the buttons on the TV case do not work (channels do not change and you cannot open or navigate the menu), the TV has stopped responding. Reset the TV as follows:

Some TVs have a reset button. If available and accessible, try using the reset buttons before using the steps below. Using the reset buttons can save time.
1. Unplug the TV power cord from the power outlet.
2. Unplug any connected devices (DVD, Set-top boxes, etc...)
3. Press and hold the TV power button for five seconds.
4. Plug the TV power cord back into the power outlet and turn on the TV.
5. Open the on-screen menu to confirm that the TV is responding again.
6. Turn off the TV and reconnect the devices.
7. Turn on the TV.

LCD TV TroubleshootingThe defective LCD TV may have the following common symptoms:

Symptom: No picture on screen but LCD TV still has sound.
Solutions: The problem is cause by defective inverter. Replacing ivnerter will solve hte problem. Symptom: Screen flash on and off between 1/2 to a few seconds, but power indicate light stays on and TV still has sound.
Solutions: The problem is cause by defective inverter. Symptom: Blue Screen but no picture
Solutions: The problem is cause by defective Main Board(AD Board). In some cases, this problem may cause by the defective Screen Controller board. Thsi board is mounting on teh back of LCD TV Scree. Symptom: Power light stays on but no display and sound
Solutions: The problem is cause by defective Main Board(AD Board) or Power supply board. Symptom: No Power or Power indicate light does not lits
Solutions: The problem could cause either by defective Power supply board or defective Main Board(AD Board). Symptom: Screen is half dim and half bright
Solutions: The problem is cause by defective LCD Panel.It needs to be replace.

Hope it may help you;


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1 Answer

Power problem

If you don't have any indicators working, you have probably lost your power supply. With no picture and no sound the chances are you have either lost the power supply or blown a fuse. If you remove the cover and look at the circuit board there is a fuse located near the rear of the chassis near where the power cord connects to the chassis. If the fuse is blown, it is advisable to replace your damaged power cord before replacing the fuse. The cord could have a short and this could create a fire. Be very careful when working on any television. Be sure it is unplugged for more than one day to allow the high voltage to decay from the picture tube. Do not touch the picture tube, it still may have some residual voltage and could shock you. If you replace the cord and fuse and still have the same problem, you will probably find that the high voltage transistor is bad and needs to be replaced.


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No picture, sound and flashing red power light...

Pull off the back pressboard. At the bottom left hand corner is the power cord that attaches to the power supply board. There is a white plug that attaches directly to the power cord. With the TV power off, pull this white plug up to disconnect. Then push it back in. Then plug your TV back in and press the power button on the front of the TV. I just did this and it is working fine.

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1 Answer

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