E320-A0 with near death

[jjon]

I have a Vizio E320-A0 which is about three years old. Recently it would not turn on, so i researched a bit and learned about power cycling it. Sometimes after unplugging it and holding the start button down for 30 seconds, it would then start, but often I had to do that maneuver ten times to get it to work. Every time, when I plugged it back in, the white light in the lower left corner would come on for 5 seconds or so and then fade.

I pulled the back off and there is just the power supply board (0500-0512-2040) and the main board (3632-2052-0150(6C)). Looked at a youtube video which said to check the AC voltage at the cord (was normal 120 V) and then check the DC voltage at output jack on the power supply board. It said that should be 24 dcv. I checked and can only measure 19.5 volts. Does that mean the power panel is the problem, or is 19.5 ok, or do i have a lousy multimeter?

I know that the eeproms on the main boards fail frequently on this set, but before i bought a new board I thought I would ask about the power supply voltage thing. Thanks so much for your time.

[budm]

Re: E320-A0 with near death

You can start by uploading the pictures of the whole back side of the TV so we can see all the boards.
This is your power supply board?
http://www.shopjimmy.com/vizio-0500-...upply-unit.htm
Pictures provided by shopjimmy.
Yes, you should verify your meter to make it is not giving you false readings.

[goontron]

Re: E320-A0 with near death

I have a Vizio E320-A0 which is about three years old. Recently it would not turn on, so i researched a bit and learned about power cycling it. Sometimes after unplugging it and holding the start button down for 30 seconds, it would then start, but often I had to do that maneuver ten times to get it to work. Every time, when I plugged it back in, the white light in the lower left corner would come on for 5 seconds or so and then fade.

I pulled the back off and there is just the power supply board (0500-0512-2040) and the main board (3632-2052-0150(6C)). Looked at a youtube video which said to check the AC voltage at the cord (was normal 120 V) and then check the DC voltage at output jack on the power supply board. It said that should be 24 dcv. I checked and can only measure 19.5 volts. Does that mean the power panel is the problem, or is 19.5 ok, or do i have a lousy multimeter?

I know that the eeproms on the main boards fail frequently on this set, but before i bought a new board I thought I would ask about the power supply voltage thing. Thanks so much for your time.

Hey, another person from the mile high metro area!

[jjon]

Re: E320-A0 with near death

Here are the photos. Yes that is the power board. The multimeter was spot on measuring the voltage (AC) coming out of the wall. It gave me 9.6 v on a 9 volt battery and 1.6 v on a 1.5 volt AA battery.

[budm]

Re: E320-A0 with near death

Do you get 24VDC if the cable between the main board is not connected to the power supply.
The other symptom you have does sound like main board problem.

[jjon]

Re: E320-A0 with near death

If i understand you correctly, you are asking if I still get 19.5 v after disconnecting the cable which runs between the two boards? Yes, I still get 19.5 v with that cable disconnected.

[budm]

Re: E320-A0 with near death

If i understand you correctly, you are asking if I still get 19.5 v after disconnecting the cable which runs between the two boards? Yes, I still get 19.5 v with that cable disconnected.

Then you have two problems, if the power supply is supposed to put out 24V and you only getting 19.5V.
19.5V should be enough to run the main board but may not be enough for the LED driver circuit. So I would try to get the 24VDC back first.

[jjon]

Re: E320-A0 with near death

Thanks a lot. You are a tremendous amount of help.