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My tv a magnavox model #32MF338B/F7 turns off within a few minutes of turning it on.

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The heat sink has been damaged

Posted on Mar 23, 2011

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Unit will not turn on without be unplugged for several minutes. Even the red indicator light goes off as if it has no power.


Sounds like main power regulator board [SMPS] fault. Contact any service technician. If you wish to get some details; check the site linked here. Viewing it in "Mosaic" will make surf easy.
http://electronicshelponline.blogspot.com/

Mar 21, 2014 | Magnavox 32MF338B 32 in. LCD HDTV

1 Answer

Magnavox model 46mf440b/f7 tv will not power on


Probably the power supply has failed.

Jan 07, 2014 | Toys

1 Answer

WHen it turns on it scans for channels but never picks up a channel. We have directtv so all we need is it to pick up channel 3 or 4 so we can watch it through the box.


forget about the cable box for a minute. You need to go into the menu and change the source, right now its set to cable and your tv is acting as is own cable box decoder.

Mar 11, 2011 | Magnavox 32MF338B 32 in. LCD HDTV

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How do i get regular tv channels no cable or direct tv. I have a 32' magnavox model #32MF338B/F7


Hello
I'm not sure about the model number of your TV, as here it is marked as both "27MS343S and 32MF338B/F7". Anyway I gies this solution as for the first denoted.
Insert antena to the antena socket at the back side of your TV marked as 75Ohms antena input.
[1] Press "Menu" button on the remote control handset to display menu on screen.
[2] Press "Vol+ or Vol--" button repetedly to hilight "TUN" [Tuner].
[3] Press "Ch+ or Ch--" button to hilight 'AUTOPROGRAM"
[4] Press "Vol+" to programming tv channels.
Tv will tune and store channels transmitted channels at that time, through entire bands, and will display the first channel receved after tuning process completed. It may take some minutes. You have to wait it to complete. After displaying the first channel, you can select your favourite channel Using CH+ or CH--" buttons. Ok.

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

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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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The tv just shut off after being on for about 5 minutes,now when trying to power on the power light flashes 4-5 times then it shuts right back off it's a 32" lcd magnavox 32mf338b


Hi Michael,

It sounds like you are having a problem with the mainboard in your TV. You could try a power drain:

1. Unplug the product's power cable so that the device is not grounded to the house. Do not simply turn off the power-bar if one is in use.
2. Press and hold in the products power button for 1 minute to release the retained electricity from the capacitors and circuit board.
3. Plug the product back into the wall outlet rather than a power-bar to rule it out of contributing to the problem and turn the device back on. If this doesn't help, the TV will likely require service. Since the TV is attempting to power on, I would say the power supply is fine otherwise you wouldn't see the LED's flashing. Good luck.

Oct 16, 2008 | Televison & Video

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