Magnavox 26MF231D/37 Shrieks & Shuts Down

white05ltMarch 5, 2008

Hey all,

I'm new to the forum and I'm having a very odd problem with my Magnavox LCD Flat Screen TV. The set will turn on and boot up. However even if left alone for 20-30 minutes, the tv will suddenly black out and make a loud terrible shrieking noise for about 3-4 seconds and then shut itself off. After about 3 seconds the tv will reboot and work perfectly again, for about 10-15 minutes before shrieking and shutting off again. The cycle goes 3 times and finally the tv will not boot again.

I'm thinking it might be a board or something to that effect. Any help would be appreciated.

-Anthony

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white05lt

Any help on this issue??

    Bookmark   March 23, 2008 at 3:35PM
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computertech1990_gmail_com

Hi all i found the problem i have the same lcd model #26mf231/37 Mainboard #313815866861 6182.2 , 6281.3 ,6285.4 All apllies Im a technician since 1990 and here is what i discovered. I opened the back cover and removed the metal casing i cutoff a rectangular box from the metal casing to expose most of the power supply and i also cut the same square box from the cover backside. bought a metal mesh so that the power supply can breath. Next i wanted to make sure my main board was good so here is what i did. I pluged in my soldering iron 30 watts then located a crystal board location 1H00 and i applied heat to it while the tv was on and sure enought it turned off that's where the problem is. Remove the main board and add alittle bit of new solder and walla. Let me explain the problem: The 1H00 is a crystal safety feature when it gets hot the solder around it contract therefore it looses connection is common is lcd/plasma T.V's heat is Evil in any component. Anyway once you have acomplish all of the above you should be good to go. Please email me and let me know how you made out with the T.V. Will be appreciated computertech1990@gmail.com

    Bookmark   March 17, 2011 at 5:41PM
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