Re: Magnavox 42" LCD 42MF521D/37 Dead - no lights
I got the part number from the diagram you posted - L5973D013TR. Ordered this:
[url]http://www.digikey.com/product-detail/en/L5973D013TR/497-4566-1-ND/806442[/url]
I used an old ATX PC power supply for the 12V with a fuse wired inline.Re: Magnavox 42" LCD 42MF521D/37 Dea...<br />
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Re: Magnavox 42" LCD 42MF521D/37 Dead - no lights
I connected an external 12V power source to pin 1 and am now able to get the power LED to come on. There are also a couple of little LEDs on the mainboard that lit up. I also get 12V at that fuse now.
TV still won't power up, hopefully because the rest of IC7003 doesn't work. I'm going to replace it and hope for the best. I'll let you know how it goes.
Thanks a bunch for all of the help on this.
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Re: Magnavox 42" LCD 42MF521D/37 Dead - no lights
kevinm34232 -
Yes, I'm getting 16V to the main board. Pins 1 and 2 read 16V, pin 3 reads 24V. I checked for voltage at the fuse as you suggested but am not getting any (if I'm checking in the right place).
In post #6 I posted a picture with labels on it where I tested the voltage. I'm not 100% sure I tested the right component.
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Re: Magnavox 42" LCD 42MF521D/37 Dead - no lights
budm - I'm not sure about the chassis number. Attached are some pics of the tags I see (one from the back of the plastic housing, one is from inside). Let me know if there is somewhere else I should check.
Also, when I press the power button the voltage on the big cap goes up to around 400V then drops back to 165V after several seconds....
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Re: Magnavox 42" LCD 42MF521D/37 Dead - no lights
Thanks for the suggestion of new caps, dgtech. I'll try to source some locally but will order them if needed.
Kevinm34232 - I think I found the fuse you are referring to on the main board (thanks to an old thread where dgtech had posted a picture of it). I get no voltage on either side of it.
I attached a picture where I tested the voltage. It is in the upper left corner....
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Magnavox 42" LCD 42MF521D/37 Dead - no lights
Hi everybody. I have a Magnavox 42MF521D/37 that will not power up. There are no lights at all. I was hoping to find capacitors that were visibly bad, but no such luck.
I have tried some of the testing mentioned in this thread:
[url]https://www.badcaps.net/forum/showthread.php?t=11962[/url]
Specifically, I tested the voltages recommended by PlainBill in Post #4. The input rectifier measures 165V and the PFC output cap also measures 165V. I also ran across a thread that suggested testing the diodes, so I have done that as well. The diode at position...
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