Vizio P42HDTV10A power issue

[blee1099]

Got a Vizio P42HDTV10A that stumping me. Basically it has no vs or va voltages. It does have the 5v standby and the orange standby light. When its plugged in initially, it'll click a relay once. At that point there is no va or vs voltages. Unplugged the cables to the Y-sus and Z-sus with similar results no vs or va voltage. The SMPS has a auto/normal switch, if its in the auto mode, the panel does light up and produces voltages @ Y-sus & Z-sus. Thinking either its a main board issue or a control board but not sure if there's a way to check to see if its the main. Was hoping there was a way to force the tv to turn on like the Samsung tv's where you can jumper the logic board and short the pins on the smps's power on & ground pins..

[tom66]

Re: Vizio P42HDTV10A power issue

Check for VS-ON signal.

Samsung, LG or Panasonic panel?

[blee1099]

Re: Vizio P42HDTV10A power issue

LG panel.
VS-on I get 5V

[tom66]

Re: Vizio P42HDTV10A power issue

So is it not possible to use PSU in auto mode? I'm a little lost.

[blee1099]

Re: Vizio P42HDTV10A power issue

Yea basically in auto mode no inputs show up.. I'm thinking its the main board but I see no mention of the auto/normal switch in either a LG or Vizio service manuals.

[tom66]

Re: Vizio P42HDTV10A power issue

In auto mode does it power up right away when plugging in? Maybe the main board isn't expecting that.

[blee1099]

Re: Vizio P42HDTV10A power issue

Yea it brings the backlight up on the panel right away along with the y-sus, z-sus, etc. Just no on screen display or functions.

[allsyst]

Re: Vizio P42HDTV10A power issue

Hi.. did you ever find the answer to your tv prob? mine is having the same symptons.. just an oragne led unlesss i slide the switch

ty