Re: Vizio SV421XVT Standby On but no power on (don't hear "click")

For anyone else with the same problem.

I measured PS_ON at 1.12v and INV_ON/OFF at 0v. Since the power board was outputting all the correct voltages, I guessed the mainboard was broken.

I replaced the mainboard and my TV works again. PS_ON now reads 2.89v and INV_ON/OFF 3.32v.

Re: Vizio SV421XVT Standby On but no power on (don't hear "click")

U10
L361
05627 OR G5627
pin 1 5.06v
pin 2 0.796v
pin 3 0v
pin 4 0.795v
pin 5 4.93v
pin 6 0v
pin 7 1.095v
pin 8 5.08v

Thx again!

Re: Vizio SV421XVT Standby On but no power on (don't hear "click")

Just a bad angle. I can't find any evidence of bulging/leaking on the sides/top/bottom for any of the caps on the power board or main board.

Re: Vizio SV421XVT Standby On but no power on (don't hear "click")

Here's the rest of the measurements from the service manual

U1
49530W
936104
pin 5 5.06v
pin 6 5.06v
pin 7 5.06v
pin 8 5.06v

U2
L213
G9117
pin 1 2.038v
pin 2 3.285v
pin 3 5.09v

U3
L313
G1084
pin 1 2.057v
pin 2 3.307v
pin 3 5.06v

U5
L313
G1084
pin 1 2.05v
pin 2 3.3v
pin 3 5.06v

U9
L313
G1084
pin 1...

My TV died the other night. The vizio text on the front illuminates orange when I plug the TV in but pressing the power button (on the remote and tv) does not turn the TV on. I don't hear the "click" which I assume is a relay.

I'm doing the DC-DC Converter troubleshooting from the service manual:

J1-10 05.14v
J1-11 05.14v
J1-12 05.14v
J1-02 12.00v (power switch on and off)
J1-03 12.00v (power switch on and off)
J1-04 -04.10 mv (power switch on and off)

Not sure if I stop here because J1-04 didn't measure correctly?...