Question about Philips Magnavox 50ML8105D 50" HDTV DLP TV

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My magnavox 32mf339b/f7 keeps turning off and on

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The small signal board is the issue, it's a common issue and needs service, however if you do not have an extended warranty philips/magnavox will not cover it and will do everything to say it's not a common problem.

Posted on May 06, 2010

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How to turn off closed captioning on my 32mf301b f7 magnavox tv without a remote?


You have to have a remote to do so. You may be able to purchase a universal remote and do the same thing.

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Magnavox 32MF339B volume level goes up and down on its own.


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Only has grey screen


Hi a grey screen would tell me that your screen is not getting a signal from your signal board. The t-con board is what transfers the signal so I would suspect that is were the problem is.

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3 Answers

Need to find out a part # for my philips 52PFL7403/f7 for the ir sensor


Join Date: Nov 2011 I have a Philips 47PFL3603D/F7 with the same problem. It was the IR sensor board causing the problem. You can search online to find the board, which almost everyone will most likely not have in stock, and cant be ordered. The part you need is this: 313926859181 IR Remote Sensor.

Models it will fit are as follows: Substitute Parts 313926859182
Known Models
MAGNAVOX 42MF438B/27
MAGNAVOX 42MF438B/27
MAGNAVOX 42MF438B/F7
MAGNAVOX 52MF438B/27
MAGNAVOX 52MF438B/F7
PHILIPS 32PFL3403D/85
PHILIPS 42PFL3403D/27
PHILIPS 42PFL3403D/F7
PHILIPS 42PFL3603D/27
PHILIPS 42PFL3603D/F7
PHILIPS 47PFL3603D/27
PHILIPS 47PFL3603D/F7
PHILIPS 52PFL3603D/27
PHILIPS 52PFL3603D/F7

If you can find the board, great! A replacement board costs about $12.00. If you can't... we'll there is something you can try ; )

Either way, if you know it's the board, what's the harm in trying?

Remove the back from the TV. You can actually leave it on your stand to do this if you can spin it around to gain access to the back of it. Be sure to unplug everything first!!!

Looking at the back of the tv, the board will be located in the lower left side by the speaker. It will have 2 cables attached to it. Remove them, and take out the screw or two that holds it in place. There will be a plastic tab that keeps it in place also.

Take your fingernail and bend the tab back, and the board should come free. After that you should be holding the board in your hands. The side of the board with the connectors on it is the side you want to manipulate. There will be a tiny surface mounted capacitor beside one of the wire connection sockets. Take a utility knife and scrape it off/ you could use a soldering iron but it should come off very easy with a knife.

Plug it back in, and give it a try! If it works... great! If not, find a replacement board, and try that.

Hope it helps someone!!!! quote.gif

May 30, 2011 | Philips 52PFL7403D 52 in. LCD HDTV

1 Answer

Magnavox 42 LCD 42mf438b/f7 turns on/off by itself


Mine was doing the same thing. Update the firmware and it fixes the problem. Updating the firmware is done by downloading the file to a thumb-drive from the phillips product support page then plugging in the drive into the side of your television and turning it on. See your manual for slightly better instructions.

Jul 08, 2009 | Philips Magnavox 50ML8105D 50" HDTV DLP TV

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