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Vizio 42" LED TV released in September 2012.

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VISIO M43-C1 no display, blinking power light

so I repaired this once before. I purchased the power board, the main logic board and the lcd board,  the problem was only with one of them,  and I can’t remember for the life of me which board actually repaired the issue.  I wanna say it was the main logic board, but I could be wrong.  These boards are now double in cost of what I paid last time.  Any thoughts on which board would have fixed this issue?   the Power light will go on,  then slowly fade out,  then start blinking,   I’ve done hard resets and it doesn’t fix it.

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Hey, did you ever get this fixed? Was it the power board, main board, or t-con board? Thanks.

par

just fixed this TV myself. Most likely main board BGA solder points. Gets really hot and cooling solution is poor. See posts here (my user name is howardc64) https://www.badcaps.net/forum/showthread...

par

I replaced my tcon board and that did not resolve it. looking to figure out which board it is. Its such a nice tv to throw in the trash..

par

failures are almost always the main board. Read the link I provided on 8/27/19 post. My last post(s) explains the best we can do for DIY. Just toaster oven reflow.

par

I literally just posted a question about this, I changed the power supply and main board to no avail. That leaves the LCD board?????

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Hello, check the output voltages on the power supply, especially the standby 5volt this should be supplied to the main board at all times when the set is plugged into the AC. If it the 5v fades in voltage then the problem is likely a bad filter cap in the 5v standby circuit.

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The same thing happened to me. I purchased a Main Board (756TXFCB0QK0030) and replaced it in 2019 and it works fine now.

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leo rizzo sera éternellement reconnaissant.
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