Vizio L32 HDTV 10a No power, no standby LEd Nothing.

[Ziggazam]

I am Currently working on a Vizio HDTV that isn't giving me any sort of response. when plugged in. I have no Lights for standby or any form of sound or anything from the set. It seems to not be getting any power. I am assuming that It is the power supply, But I Need to be sure. All other connections and boards look normal. Does anyone have any insight on what This Could be. I Have provided a Picture of the Supply board to the Vizio.

[retiredcaps]

Re: Vizio L32 HDTV 10a No power, no standby LEd Nothing.

1) Do you get 5V standby on the power board?

2) If yes, then check your voltage regulators on the main board as per my sig file below.

[drpj23]

Re: Vizio L32 HDTV 10a No power, no standby LEd Nothing.

If #1 is no, is the main AC line fuse OK?

[Ziggazam]

Re: Vizio L32 HDTV 10a No power, no standby LEd Nothing.

The main fuse is ok . I tested it first.

[Ziggazam]

Re: Vizio L32 HDTV 10a No power, no standby LEd Nothing.

the Power cord also is fine I tested two power cords & it actually uses the same voltage power cord as a Xbox 360 power supply. and it powers normal and there are no shorts or misses in the cable.

[tom66]

Re: Vizio L32 HDTV 10a No power, no standby LEd Nothing.

Have you tested the 5V standby? If you post a closer shot of the connectors going from the power supply to the main board (which has HDMI etc on it) we can highlight the places to test. If there is a legend such as 5VSB next to a pin, that probably is the 5V standby voltage.

[budm]

Re: Vizio L32 HDTV 10a No power, no standby LEd Nothing.

Check these pins on the connector: or post the closed up pictures of your connectors.
My board may not be the same as yours.
http://s807.photobucket.com/albums/y...t=DSC00335.jpg

[Ziggazam]

Re: Vizio L32 HDTV 10a No power, no standby LEd Nothing.

close up of some connectors

[tom66]

Re: Vizio L32 HDTV 10a No power, no standby LEd Nothing.

Can you get a pic of the others? You could also just list them on the forum and we can tell you which to test.

[Ziggazam]

Re: Vizio L32 HDTV 10a No power, no standby LEd Nothing.

More photos

[tom66]

Re: Vizio L32 HDTV 10a No power, no standby LEd Nothing.

Can you get a pic of the other connectors - the ones at the top of the PSU.

[budm]

Re: Vizio L32 HDTV 10a No power, no standby LEd Nothing.

OK, put the black meter probe of the DC Volt meter to the metal chassis, the Red probe on the terminal that is labeled with '5V' and see if you do have that standby 5V coming out.
Please also take CLEAR AND FOCUSED pictures of the connectors front view so we can read all the lables on the connectors.

[Ziggazam]

Re: Vizio L32 HDTV 10a No power, no standby LEd Nothing.

The other photos

[budm]

Re: Vizio L32 HDTV 10a No power, no standby LEd Nothing.

Do you get the 5v on the connector? How about the pictures of th 3 DC output connectors?

[Ziggazam]

Re: Vizio L32 HDTV 10a No power, no standby LEd Nothing.

one more, much better photo

[budm]

Re: Vizio L32 HDTV 10a No power, no standby LEd Nothing.

Thanks, that is much better. So check that 5v OUTPUT.

[Ziggazam]

Re: Vizio L32 HDTV 10a No power, no standby LEd Nothing.

I checked that 5v output And it not giving me anything. Over 000.0 on the multimeter that was dc

[tom66]

Re: Vizio L32 HDTV 10a No power, no standby LEd Nothing.

OK, so the PSU is dead. There is a white ceramic fuse here. With the power to the board unplugged (very important) test the resistance across it - should be close to zero ohms.

[blazer]

Re: Vizio L32 HDTV 10a No power, no standby LEd Nothing.

so pls what is the next step after this ?

[budm]

Re: Vizio L32 HDTV 10a No power, no standby LEd Nothing.

@blazer, so you also do not have 5V STANDBY either? Fuse is good? if so, then with just the power supply by itself, check and see if you do have about 160~170VDC RIGHT AT THE TWO LEGS OF THE MAIN FILTER cap (the big cap with 450VDC rating).