Question about Philips Magnavox 27MS343S 27" TV

1 Answer

My 37" LCD maganavox tv won't turn on - it blinks green and then eventually will turn solid green and then the tv will come on. This has been happening for a few weeks.

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  • Anonymous Apr 25, 2009

    My 37" LCD maganavox tv won't turn on - it blinks green and goes off. Using the remote on button several times and it wiil eventually turn tv on. I have had thus problem twice. Ist time cost $300 dollars for a new powe board and looks like another $3oo dollars. Seems this is a major problem and nothing being done to help it from happening again.

  • Rich64804 May 11, 2010

    My power board does not have these parts. Rich

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  • Philips Master
  • 19,396 Answers

If the TV goes in standby, then it is in protection mode.

Ensure also that the fault is not coming from a faulty receiver box sending
bad signal, check if you get same problem on DVD with no receiver box
connected.

Try first leaving the TV power cord unplugged for some times, let say one hour or so.

The flashing light indicates a diagnostic state called protection.
When the TV goes on protection there are only two possible causes.

1The internal circuits are jammed because of electrostatic charges accumulating on capacitors, or because of a wrong voltage read by the main chip on your monitor controller board. this started the protection circuit.

2 The protection circuit detected a wrong voltage or abroken contact, identified an internal fault and kicked in , starting the flashing light.

If you are in situation one, then the TV will reset just unplugging power cord for one or two hours,sometimes even minutes.

If you are in situation 2 , then there is an internal fault.

If under warranty contact the manufacturer ringing the number on the user manual

If you want to repair at your own expenses, just locate any good qualified repairer.

If you want to DIY you find parts here,

All: Appliance parts, electronics parts & more from PartStore.com

Encompass Parts Distribution

LCD/Plasma Electronic Replacement Parts: Plasma & LCD TVs, Appliances |


On LCD Pay particular attention at inverter and power board, power board can be inspected looking for bulged or leaking capacitors, then tested with a multimeter. The inverter is more difficult to test , there is need to read voltages, should be done by a tech. Also the LCD controller board can cause same problem

On Plasma, test Sustain (Ysus/Zsus) / Buffer boards , cables to plasma, digital board and power board.

On Rear Projection : check lamp, lamp ballast, power board, and convergence.

On CRT TVs, check ballast , flyback transformer, CRT, Tuner, Convergence.

Posted on Apr 19, 2009

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