Question about Philips Magnavox 51MP392H Rear Projection Television

1 Answer

Power problem The red light on the power switch comes on and there is a steady beaping type sound coming from something on one of the boards. No picture, no sound.

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  • mikes30 Feb 10, 2008

    I also have a magnavox rear proj and it does the same thing. I have a different model 51wmag2k4rh, but exact same problem.

  • tntchitwood Feb 16, 2008

    Still having the problem.Any help would be greatly appreciated.

  • tntchitwood Mar 17, 2008

    The Chassis no. is MAG1_AA. Sorry my response took so long I had given up on anybody helping me.

  • tntchitwood Jul 20, 2008

    You guys ****!

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  • Philips Master
  • 8,617 Answers

What is the chassis number to your set. Have to go by chassis numbers on phillips/magnavox and RCA tvs.

Posted on Feb 22, 2008

  • Sonny Berry
    Sonny Berry Jul 20, 2008

    You know most of us have regular jobs we do this to try to help people out, when you post without giving the model number then it takes a while for you to respond, we have no way to be here everyday. But beaping is usually related to the horizontal output or the HV transistor being faulty.

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Solved by resoldering some solder joints!!!!!!!
********
Toshiba Model 57H81 Rear Projection TV - Purchased 11-09-2001

Problem: Toshiba 57H81 Flashing Red Power Light, No Picture/Sound, Blown Fuses F850 + F852

Symptoms January, 2009:

  • Upon turning on set I got flashing red power light and nothing else.
  • Removing plug for one minute and plugging in results in:
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    • Pushing power button results in steady red for about 2 seconds then slow flashing red light, no other set activity
  • Removing power cord for several hours and plugging back in made no change
    • Audible click, steady red for about 2 seconds then slow flashing red light
  • Possible related note: Over past several months occasionally the entire screen would flicker momentarily and at other times be problem free for weeks.
  • Fuses F850 and F852 found blown

Repairs Made:
  • PD0074 DEF/CON Power Board
    • There are two main power supply capacitors in this set. They are C-809 and C-810. One their negative lead on the printed circuit board re-soldered leads and nearby contacts. I’m told that because the factory left out a printed circuit board eyelet, the connection will come loose over time. When I called Toshiba customer service they said there was a known solder joint problem causing blinking red light.
    • Replaced blown fuses F850 and F852.
      • I actually installed a fuse panel on the inside of the cabinet and routed the fuse connections here instead of ordering the special fuses and replacing them on the circuit board.
      • Had to use a 5 Amp SLO-BLOW for F850. Fast blow does not survive power up. Get the red blinking light.
      • Used a fast blow 2 Amp for F852.
  • PD0073 SIGNAL Board
    • Re-soldered Q751 + Q752 STK392-110 Convergence Amps
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Total Cost to Repair about $10
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