Question about Toymax Magnavox 37MF331D 37 in. LCD TV
It may be a safety thermistor component inside tripping as it overheats just as you suspect - working like an electrical fuse, but responds to heat instead. They can go faulty and start turning the power off too soon
Another possible cause is a dry solder joint (very common problem). It's ok while cool, but after a few minutes of being on, the heat in TV causes the tiny solder break to widen just enough to switch it off.
If you can leave it on with the fan blowing on it, and it does keep going on & off without you touching it, then i'd say it's 95% certainly a thermistor.
If it turns off, and you have to turn it back on manually (it goes onto standby or off completely), then it could be either, causing the problem.
Another final thing I see as possible is, the screens inverter can be heating up and going off (the TV will stay on really, but the screen will go black as if it's off, and when cooled even slightly it can turn back on again. You can check this easily by putting a bright lamp close up to the screen. The picture will still be there, but very very dark - a flat light gently touching against the screen will allow you to just about see the TV picture.
(the screen inverter is a special high powered circuit that takes a lower voltage (usually about 12 volts) and converts into a huge amount needed to work the powerful bulbs in TV screens.
Posted on Nov 10, 2010
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
Here's a link to this great service
Posted on Jan 02, 2017
Tips for a great answer:
May 01, 2018 | Cars & Trucks
Sep 19, 2017 | Crock Pots & Slow Cookers
Apr 17, 2012 | Dometic RM2652 Refrigerator
Feb 04, 2012 | Ovens
May 01, 2011 | Sanyo PLC XU30 Multimedia Projector
Apr 27, 2011 | Hitachi EC119SA Twin-Stack Air Compressor...
Mar 27, 2011 | Ovens
Apr 24, 2010 | Heating & Cooling
Apr 01, 2009 | Kenmore 63942 Dryer
Sep 16, 2008 | GE JVM1870 Microwave Oven
95 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: