Question about Philips Magnavox 42MF521D/37 Television
When I press the power button on the front of the tv it just flashes green. Thats all it does flash green no sound no picture nothing. PLEASE HELP
This is a bad power supply and an easy fix. Their are several electrolytic capacitors on the power supply. If one is bad it will have a bulge on the top. Mine had a bad 2200uF and a bad 1200uF capacitor. About $7 worth of parts at Radio Shack. Radio Shack had the 2200uF but it was axial leads instead of radial. (leads come out of each end instead of one end) but It will still fit. They only had a 1000uf capacitor so I combined that with a 220uF capacitor and wired them in parallel. Make sure you put them in with the correct polarity.
Posted on Dec 06, 2008
I just used solution #1 with a 2200 microfarad electrolytic capacitor from Radio Shack to replace the bulged one I found. It had a very slight bulge in the top and a small deposit of black goo (electrolyte) on the top of the capacitor. Removed the bad one, replaced it with the new one (polarity in mind) and put it all back together. The problem is gone. Pressed the button and it started right up. 1.5 hours including the trip to Radio Shack.
Posted on Oct 13, 2009
Can you please tell me the voltage and the actual board location of the 1000uF, 2200uF and 220uF capacitors that are failing on the power supply board of Magnavox 37MF437B/37 television?
Posted on Feb 22, 2010
Solution #1 is the ticket. Radio shack has some caps that work, not identical, but they fit. You must remove rear cover, remove power suppy board. radio shack only has 1000uf and 220uf caps, so solder togethter and install in parallel, the 2200uf is axial so lay it on it's side to install. $8.50 in parts, and about a hour time. You must squeeze the wings together and use caution on the connector just above the power supply, the rest of the connectors just pull apart.
Posted on Mar 29, 2009
I solved this by turning the power on then pressing buttons on the remote randomly. Ofcourse I tried logigal buttons first but when that did not work I just started pushing them all and eventually I noticed that the green light turned solid and a moment later my picture was available. Sounds stupid but it worked.
Posted on Dec 02, 2008
The general problem with LCD type TV's is that the power supply fails.
They are very sophisticated designs that are difficult to troubleshoot
and generally best to just replace the module, but sometimes there is
visible damage in some of the electrolytic capacitors (visibly bulged)
and higher voltage rated parts can be substituted.
Hope Ya Fix It
Posted on Mar 05, 2008
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Posted on Jan 02, 2017
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Sounds like you need to repair the power supply, don't fret, it can be really easy. Here is a pair of youtube videos I made after following some advice on this website from other posters:
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