Vizio VO42L Turns on by self NO Pic or Sound

[budm]

Re: Vizio VO42L Turns on by self NO Pic or Sound

OK, Voltages look OK, one signal is missing is the BL_ON signal for turning on the inverter boards. Did you check it at the inverter board to see if it is present? Pictures of your inverter boards?

[plafleursr]

Re: Vizio VO42L Turns on by self NO Pic or Sound

No I only checked 24 volts at Inverter board. Only have one inverter board. Will have to take apart and do photo.

But still have issue as you don't turn on TV, goes abler to white once plugged in to wall outlet and you can't turn of except to unplug.

[plafleursr]

Re: Vizio VO42L Turns on by self NO Pic or Sound

Ok tooks readings, bad light and bad eyes but here they are.
1-5 VBL 26 volts
6-10 GND 0 volts
11 VVR-a N/a no wire
12 V on-off 0
13 VBQ-V 0
14 status N/a no wire

[budm]

Re: Vizio VO42L Turns on by self NO Pic or Sound

OK:
"12 V on-off 0" This si the Inverter ON/OFF, right now it is not being told to turn. This will explain why you do not have the backlights. It means that you have main board problem, and since you cannot control the TV either so your main board is bad. This is the reason I am looking to see if the ON/OFF (BL_ON) is present or not to confirm that the main board is bad.
Check shopjimmy.com to see what the replacement board will cost.

[plafleursr]

Re: Vizio VO42L Turns on by self NO Pic or Sound

Thanks That is what I thought, Got a Board coming .

Thanks for the Help

Pete

[plafleursr]

Re: Vizio VO42L Turns on by self NO Pic or Sound

Received the replacement Main Board, Installed works great. Now what do i do with old one ??

Thanks for the Help

[tom66]

Re: Vizio VO42L Turns on by self NO Pic or Sound

Sell it as faulty, keep it for reference or throw it away.

[budm]

Re: Vizio VO42L Turns on by self NO Pic or Sound

Great news. Board came to you pretty fast. How much?

[plafleursr]

Re: Vizio VO42L Turns on by self NO Pic or Sound

Bought it used on E-bay $63.00. Ordered before I did all those tests. Thought if it was turning on by self board bad.

[Louis82]

Re: Vizio VO42L Turns on by self NO Pic or Sound

Im working on the same model VO42L. Tv turns on normally sound and picture play fine for 5 minutes then everything turns off, even the Vizio logo in the front. I check the 5v pin and there is no voltages at all. I need to unplug the tv for 2 minutes plug it back and i get 5v again. I think its a power supply issue. Any suggestion before i order this? Thank you