I really would appreciate some help with the Vizio M421VT. The tv has no sound, and I have done everything to check for audio including using an external speaker on audio out. As far as I can get is sound when flipping channels like a like when changing stations on a radio. I hear something for less then a second then nothing. The channel source is antenna.
I purchased a mainboard second hand, and when installed, the Vizio logo blinks 24 times, then goes solid. After going solid, the led goes dim, and starts the process all over again blinking 24 times in a loop.
The seller swears the board works, but I am unable to figure out why the original board works with no audio, and the replacement does not even produce a picture.
I was wondering if anyone can give me some helpful info?
Yes the parts matched by part number.
I purchased a mainboard second hand, and when installed, the Vizio logo blinks 24 times, then goes solid. After going solid, the led goes dim, and starts the process all over again blinking 24 times in a loop.
The seller swears the board works, but I am unable to figure out why the original board works with no audio, and the replacement does not even produce a picture.
I was wondering if anyone can give me some helpful info?
Yes the parts matched by part number.