Question about Projection Televisions
I have a Philips Magnavox 17MD255/17 LCD TV. The power adapter for the unit was defective. I tried to created my own power supply and did not realize I was feeding AC voltage into the TV as opposed to the DC voltage suppled by the correct power supply. The TV will not turn on now. Is this somehting that can be repaired or is it beyond help?
It seems your "power regulator" a small unit inside tv device has damaged due to wrong power supply. In this case usually the power capacitor burns and few other electronic components like triodes. Get the help of a electronic chip technician to replace the damaged components.
Hope it works.
Posted on Mar 28, 2008
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The problem may be in your switching power supply or in your high voltage power supply, I would suggest that if you have a background in electronics you do the following.
1) look for any blown fuses and replace them
2) Using a schematic measure the incoming AC voltage and the DC levels on the output of the switching power supply.
3) remove power from the set and take resistance measurements to determine if there is a short circuit anywhere in the DC path.
4) Measure for shorts and opens in the High Voltage section of the set.
These are the usual checks you will have to do.
Now if you don't have a background in electronics, I would suggest that you have a qualified TV technician come over and check your TV set.
I hope this helps,
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