Question about Philips Magnavox 15MF400T 15 in. LCD Television

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37 inch Magnavox flat panel LCD approx 2yrs old won't show pictur

37 inch Magnavox LCD will not come on after being off for more than 5 minutes. The green light comes on and starts flashing, but no picure. It started taking 5 minutes to come on and progressed from there. I think its totally out now, because the light flashed green all night and never came on. Occasionlly it will flash a white screen, but only for a second or two after it is first turned on. I seems this is a problem with many magnavox tv's, but I haven't seen a solution listed yet. If anyone has had one of these repaired, what was the cost? Cheaper to buy a new one? If fixed one on your own, how difficult?

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  • 3 Answers

SOURCE: 50mf231d/37 magnavox plasma

i have the same problem but i play with it by pluging it in multiple times and i hear it click on then off eventually the time between it clicks on then off is longer until i finally get it to stay on .I have to do that everytime i use it . Also the update wont work for me either tried everything. It must be with the power supply becuse once i get it on it stays on, and if i turn it off after its been working for a while it comes right back on perfectly. Only when i leave it off for a few minutes the symptoms start right over.This is what i do for about 5 minutes of plugging it in and out it flicks on and then off about 2 seconds later after that ii finally get it to flck on then off about 6 seconds later. 5 more minutes of pluging it in and out it takes about 10 seconds to flick off this is when i know it is about to work.finnally the green light will stay on and the tv wont flick off you can turn it on and of with the button wait 2 min to see if the picturecomes on repeat last step until it works.This means everything works great exept for the power supply for enitial startup. I beleive its a capacitor . I will check and report back.

Posted on Nov 24, 2008

thekleppinge
  • 5 Answers

SOURCE: My magnavox 37mf321d 37 LCD tv

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

stonephoenix
  • 563 Answers

SOURCE: magnavox 42mf230a/37 turns on but no picture or

I have over 10 years experience in electronic tech support.

I know this isn't what you want to hear, but the problem you've described can't be fixed with troubleshooting. Your TV will have to be repaired. There is a part that has developed a defect and needs to be replaced. If you're under warranty or you purchased an extended warranty or service plan, the repair costs will be covered.

If you're not in warranty you'll have to pay for the repair. The cost would likely be a minimum of $300+ for parts and labor. The circuit boards in these new LCDs are not cheap at all! I've seen repair costs averaging $450 and up for large LCD TVs.

I hope I've provided you useful assistance and that this information allows you to make an informed decision as to how to proceed from here. I hope I've earned a positive rating from you today.

Please let me know if I can be of further assistance.

Posted on Jun 18, 2009

roety
  • 585 Answers

SOURCE: MAGNAVOX 32MF605W/17

Hi my name is Eric,
I hope I can help you with your issue ,
 You main a bad mainboard, a repairman will charge about $450 to replace it , use google to try and locate one yourself
 
 
If I have helped you with your issue please click accept.
If you have more questions you can still respond
I will reply asap
Thanks
Eric

Posted on Sep 26, 2009

  • 8 Answers

SOURCE: magnavox 37" flat screen model no.37mf23id/37

Yes, he means 2200 microfarret (called uf from here on out). Another important concern when buying a replacement is the voltage. You need to get something that is at least 25v. I recommend a 35v or better. Another notable point is that this may not always fix the problem. As with mine, there was also a 1200uf (microfarret) 35v capacitor that was blown. You can tell this because they bulge at the top. I have both of these caps (2200uf 35v and 1200uf 35v) on order and they will be here tomorrow. If I do not post back here then they fixed the issue for me. I suspect that this will resolve the problem. Look for bulges on top of the caps. This is an indication that they are blown. Most all of you experiancing these symptoms will see the 2200uf cap bulging but you may also see others bulging too. If you do then you need to replace those too. No electrolitic capacitor should be bulging at the top so if its bulging its bad, and if its bad then your tv will definitely not work. Have fun.

Posted on Oct 13, 2009

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