No orange light on Vizio VW37L HDTV20A

[steven50]

I have a Vizio VW37L HTDV20A with the Vizio logo not lit orange for standby.

After a lightning storm the TV started going south. I suspect the main logic board suffered many failures.

The PS puts out 5V however I do not get a PS-ON when I depress the power button.

I would like to at least to determine if the PS is still in good shape. Is there a way that I can force it to turn on so that I can check voltages?

[johnboy1313]

Re: No orange light on Vizio VW37L HDTV20A

Yes, you can force the power supply on. The trick is to use one or more 1Kohm resistors from 5V standby to PS_ON and BL_ON (or whatever it is labeled on your supply). If you post some clear pictures of your power supply, someone will guide you through the process.

[budm]

Re: No orange light on Vizio VW37L HDTV20A

So you are not getting >3vdc at the PS_ON PIN? If that is the case, you will need to look at the main board, the VIZIO is know for having bad voltage regulators, I would check them out first.
See the link below. Also check the fuses on the main board. If you search the forum on "Vizio VW37L" you will see lots of posting on this model.

[BlitzK]

Re: No orange light on Vizio VW37L HDTV20A

Old thread, but as a new member I can't make my own yet...

I'm having the same issue on my VW37L (HDTV40A).

F1 is blown. I replaced it (3a) with a 2.5a (its what I had) and it blew almost instantly.

I get 5v to f1

Any things to check beyond F1 to determine the cause of the short/failure? Anyone have a service manual?

I see the 117 regulators are iffy, but without any voltage going to them its hard to check.

Visually nothing else is "bad" on the board that I can tell.

[budm]

Re: No orange light on Vizio VW37L HDTV20A

You can start by posting good clear pictures of your boards, please read these:
https://www.badcaps.net/forum/showthread.php?t=1868

https://www.badcaps.net/forum/showthread.php?t=39740

[BlitzK]

Re: No orange light on Vizio VW37L HDTV20A

Huge JPG

[budm]

Re: No orange light on Vizio VW37L HDTV20A

Pictures of the whole board? there are more than one version of the main board used in this model, more info needed.