Vizio V320EL Power and Backlight Good, But No Picture - Please Help

[TubeJunkie]

Hi, I have a Vizio E320VL LCD TV. It powers on fine. Backlight is lit, but no picture, and no on screen menu display. Nothing on the screen at all. I've replaced or checked all caps on both boards, with no avail. Also checked the tiny fuse on the main board for continuity. At one point I had sound while hitting the input button. Any ideas? Thanks in advance for your help.

[TubeJunkie]

Re: Vizio E320VL Power and Backlight Good, But No Picture - Please Help

I misread this Vizio model number. It's actually: E320VL.

I went ahead and took some voltage readings and pic.
Starting at the bottom of the picture and working up. Not counting the first black wire:
1. Brown 5.33v
2. Red 5.33v
3. Orange -0.02v
4. Yellow -0.02v
5. Green -0.02v
6. Blue -0.02v
7. Purple 12.35v
8. Gray 12.35v
9. White 12.35v
10. Black 2.98v
11. Brown 3.29v
12. Red 0.0v
13. Orange 3.07v

Power board is a Delta DPS-165DP
0500-0407-1010

[budm]

Re: Vizio V320EL Power and Backlight Good, But No Picture - Please Help

There are labels for each one of those pins, what are they? It will make it easier to know which signals are not working.
But at this point you should check the DC Voltage at both end of the surface mounted fuse on the T-CON.

[TubeJunkie]

Re: Vizio V320EL Power and Backlight Good, But No Picture - Please Help

I've updated with corecct label now. Thanks


Wire Reading Labeled

1. Black 5.33v = +5.25 VSB
2. Brown 5.33v = +5.25 VSB
3. Red 5.33v = +5.25 VSB

4. Orange -0.02v = SGND
5. Yellow -0.02v = SGND
6. Green -0.02v = SGND
7. Blue -0.02v = SGND

8. Purple 12.35v = 12V
9. Gray 12.35v = 12V
10. White 12.35v =12V

11. Black 2.98v = PSON
12. Brown 3.29v = I-On/Off
13. Red 0.0v = LAMP

14. Orange 3.07v = DIM

Power board is a Delta DPS-165DP
0500-0407-1010

[budm]

Re: Vizio V320EL Power and Backlight Good, But No Picture - Please Help

They all good that is why the backlights inverter is working.
You need to check the DC Voltage of the T-CON board next.

[DLinkOZ]

Re: Vizio V320EL Power and Backlight Good, But No Picture - Please Help

Sounds goofy, but I had this same TV with no picture. Reseating the LVDS cable got it back up and running. That's the rare easy fix, but the simple free things should be looked at first.

[budm]

Re: Vizio V320EL Power and Backlight Good, But No Picture - Please Help

There are more than one version of this model, your TV may not have separate T-CON board.
We need good clear pictures of the whole back side of the TV to what you have.
http://www.shopjimmy.com/catalogsearch/result/?q=E320VL

[nomoresonys]

Re: Vizio V320EL Power and Backlight Good, But No Picture - Please Help

really need that tcon fuse reading budm requested.

[TubeJunkie]

Re: Vizio V320EL Power and Backlight Good, But No Picture - Please Help

This TV only has the two boards. I guess the T-Con is made into the main board. There is a narrow board long board thats made onto the top ofthe panel itself. Here are the pics.

I also tested DC voltages on both sides of both little fuses on the main board, and they are right on, and both sides read the same.

[budm]

Re: Vizio V320EL Power and Backlight Good, But No Picture - Please Help

Check fuse TF1 on the main board to see if you have Voltage at both ends.
The two white fuses are for the 5VSTBY, and for the switched 12VDC.

[TubeJunkie]

Re: Vizio V320EL Power and Backlight Good, But No Picture - Please Help

Check fuse TF1 on the main board to see if you have Voltage at both ends.
The two white fuses are for the 5VSTBY, and for the switched 12VDC.

budm Tested TF1 as you requested. I have no voltage on either side of TF1. What does this mean?

[budm]

Re: Vizio V320EL Power and Backlight Good, But No Picture - Please Help

Do you see that 8-pin device just above the FUSE? That is the power MOSFET which is used as a electronics switch to supply the Voltage to the fuse, the MOSFET is turned on (T-CON on) the by the processor of the main board, so the processor is also not sending the signal to turn on the T-CON either, no surprise there.

[TubeJunkie]

Re: Vizio V320EL Power and Backlight Good, But No Picture - Please Help

Yes budm, I see what you're refering to. So, I guess I should just find another main board?

[budm]

Re: Vizio V320EL Power and Backlight Good, But No Picture - Please Help

At this point, yes.
It can be the EEPROM problem that needs to be replaced.
http://www.shopjimmy.com/catalogsear...q=Vizio+E320VL

[nomoresonys]

Re: Vizio V320EL Power and Backlight Good, But No Picture - Please Help

This TV only has the two boards. I guess the T-Con is made into the main board. There is a narrow board long board thats made onto the top ofthe panel itself. Here are the pics.

I also tested DC voltages on both sides of both little fuses on the main board, and they are right on, and both sides read the same.

ok, my bad, couldnt tell, didnt see any pics.

[TubeJunkie]

Re: Vizio V320EL Power and Backlight Good, But No Picture - Please Help

At this point, yes.
It can be the EEPROM problem that needs to be replaced.
http://www.shopjimmy.com/catalogsear...q=Vizio+E320VL

Well, I greatly appreciate your help and Thank You for sharing your knowledge. SJ was sold out, but I found a couple on the bay for around $50. Can't get it right now, but I'll keep you posted, when I do. Happy New Year!

[budm]

Re: Vizio V320EL Power and Backlight Good, But No Picture - Please Help

Careful if you did not get from SJ since it can have EEPROM problem.