Vizio 422VA - main board?

[phil@philporter.com]

Vizio 422VA in spare bedroom. Had not turned on for awhile. When I did the white light on button in bottom right illuminated. After about 3 seconds it starts blinking a brighter white. Found no bulging caps, but still suspected power supply. Went ahead and found one online and installed. No change - still blinking white power button light.
Figure it must be main board, but hoping someone knows of something to try as these main boards seem hard to come by and about $100. Thanks.

[newtothis]

Re: Vizio 422VA - main board?

Just to be sure.. All voltages present and correct on PSU?

[mu2]

Re: Vizio 422VA - main board?

Hi,

What version of the main board do you have? There are several.
The number should be on the white sticker - something like TXA...... or TXB.....
I have a main board for one of these sets that works but the version numbers must match.
I replaced a main board recently that I believe had a corrupt eeprom - it would boot up to the Vizio logo then it would freeze. The good board that I have was a different version from the one I needed - perhaps it will match your board.
Post your board number.

Mike

[ecking767]

Re: Vizio 422VA - main board?

I have work on a couple of the Vizio E422VA, and I found crappy caps on the power supply board. Also I had a main board that have a bad eeprom. The power LED didn't do that flashing for 20 to 30 sec. its just stay lite and no response when you press the power button.

So maybe recap the power supply and if there is no change then its the main board

[phil@philporter.com]

Re: Vizio 422VA - main board?

Sorry for my delay. Had to put this project aside for awhile. Main board number is TXACB 5K00605Q.

[newtothis]

Re: Vizio 422VA - main board?

Check all voltages on PSU first