Question about Flat Panel Televisions
I have a 37'' Magnavox LCD TV (Model # - 37MF231D/37) about two weeks ago the standby light started flashing when you went to turn it on and then it would come on about 5 minutes later. Now it has gotten to the point where it doesn't come on at all. When you push the on button the standby light flashes and the screen dimly flashes light. This will go on for hours without the TV actually turning on.
This sounds like the flyback unit on the main board is burnt out! replace and you should be fine!
Posted on Dec 12, 2008
I had a similar problem which I have partially solved. The power light flashing could be due to a shorted electrolytic on the power supply board but in my case it was a shorted IC on the main board, the one with the input connectors. The IC marked 7001 shorted and got hot enough to melt the plastic. Replaced it with a new one from Mouser. The supply measured on the end of inductor 5001 farthest from the IC reads 12V now. This is a surface mount part and has a pad on the bottom that may be soldered to a pad under it. I had to cut the IC apart carefully with a Dremel cutoff wheel to remove it. That fixed the problem with the light and the remote now turns the TV on and off so the logic is working.
I now have the problem of the backlight not turning on. The driver board, the ones with the transformers, are made by Intechwave, the only info I can find is here: http://www.peopleworks.co.kr/kor/product/product_list.php?intDivision=4&intClass1=16&intClass2=41
This a 45kHz RF driver and it is not starting. If I can figure out why I'll post it for all the people who reported slow or no turn on of the backlight. These boards should have 24V between the red wires on the connectors and ground, as mine do.
Posted on Jan 27, 2009
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