Question about SNK Magnavox 42MF438B/27 42 in. LCD TV

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Magnavox 42mf438B won't power on just clicks

Tv clicks once and turns off. I can get it to come on if I hold the power button in for about 30 seconds

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Posted on Jan 02, 2017

  • 1 Answer

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

I have exactly the same problem with a Magnavox LCD 42", very similar model 42MF437B/37. I don't have a solution. If you unplug the TV and plug it back it starts working, sometimes for hours, sometimes for less than 5 minutes, before it turns off again. Does anyone have any real solution?

Posted on Aug 01, 2009

lovejoy91
  • 691 Answers

SOURCE: magnavox 42mf438b/f7 tv green power lite will

If you take back off you should see a problem with the power supply board, caps bulging outward could be 1500uf or 2200uf

Posted on Dec 06, 2010

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1 Answer

What is involved in replacing the power supply board on my Magnavox 42mf438b/27 42 in.


Pretty easy. Place the monitor face down on a blanket or something like that. Remove the screws on the back of the monitor (there will be about 20). Pull the back off, set it aside and then remove the power supply board. Pop the new one in and put it back together and you are good to go.

Feb 15, 2015 | SNK Magnavox 42MF438B/27 42 in. LCD TV

1 Answer

How to take base off magnavox tv 42MF438


Remove the machine screws that attach the base to the rear of the TV.

Jan 04, 2015 | Magnavox 42MF438B 42-inch 1080p LCD TV...

1 Answer

Magnavox 42MF439B TV stuck in stand by


First thing you can try is:
1. Unplug it from the power cord and wait a few minutes.
2. Turn it on (when it's still unplugged from power)
3. Plug it in power and try to turn it on again

Let me know if this fixes your problem or we need to look for other solutions.

Jan 05, 2014 | SNK Magnavox 42MF438B/27 42 in. LCD TV

1 Answer

Its Clicking none stop,and wont turn on


1.Check the device's battery level for at least two bars of strength.
2.If the battery level is low, charge the battery.
3.If the issue is not resolved, remove the back cover.
4.Remove the battery.
5.Wait 10 seconds.
6.Press and hold the W key.
7.While pressing down the W key, re-insert the battery.
•The device restarts and after approximately 15 seconds, the 'Recovery' screen appears
•Release the power button but *continue holding the home button*, for another 30 seconds.
Step
Thanks

Jul 30, 2012 | Philips Magnavox 52MF437S/37 52 in. LCD TV

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

Black screen


Not good. Make sure you have not blocked cooling to TV. It need s air flow. sounds like overheating

Mar 25, 2010 | SNK Magnavox 42MF438B/27 42 in. LCD TV

1 Answer

My Magnavox plasma screen tv, model number: 42MF237S/37 makes a clicking sound when I try to turn it on. No sounds, no picture, just the clicking noise. Things I have tried so far: 1) Turning the TV off...


You either have a cold solder joint in your horizontal deflection circuits or your or in your horizontal output circuit. please be careful due to the fly-back transformer still holds power even unplugged until you discharge it.( ground it out). Hope this helps.

Jan 03, 2010 | Philips Magnavox 27MS343S 27" TV

1 Answer

Magnavox 42 LCD 42mf438b/f7 turns on/off by itself sometimes screen goes blank tv unresponsive to remote


I have exactly the same problem with a Magnavox LCD 42", very similar model 42MF437B/37. I don't have a solution. If you unplug the TV and plug it back it starts working, sometimes for hours, sometimes for less than 5 minutes, before it turns off again. Does anyone have any real solution?

Jul 08, 2009 | SNK Magnavox 42MF438B/27 42 in. LCD TV

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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