Question about Philips Magnavox 51MP392H Rear Projection Television

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Philips 51 rear projection

I have a big screen tv and it was been a good one but it just started cutting off after about 30 minutes of play. it is like it is getting hot and cutting off.

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  • Philips Master
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Your assessment of heating causing the problem is likely correct.
Check to see if the cooling fan is running. It almost certainly has one.

If the fan is functional, then the probable culprit is the power supply itself if no video or audio problems have shown up.
This may or may not be a separate, replaceable board.

Posted on Jul 05, 2008

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  • Philips Master
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Thats a common problem with the DPTV300 through 355 chassis. You will either need to call in a repair tech for that type of troubleshooting, or replace the LSB circuit board ( Large Signal Board). You can get a replacement LSB circuit board at the following link for about half the price of what they actually cost. Here the link.
http://servicemanuals.vstore.ca/

Posted on Jul 05, 2008

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Posted on Jan 02, 2017

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