Vizio E320AR Powers on then no Backlight

[MagicSmoke]

I just got said tv off c-list today. Said would power on and work fine some days, other times power on with no backlight after V logo but had sound.

If anyone has problems like these it is because they cheaped out on ground points for the PSU and main.

2 screws for PSU on Primary side and 2 metal spring tabs held in by plastic lock spacers and then just taped down on back of panel for the secondary side.

Pic here for metal tabs on psu. http://hdtvparts.net/images/thumbs/0011676.jpeg

On the psu in this set the plastic lock spacer was not holding the metal spring tab to the psu board tightly. Causing a fault on backlight circuit shutting it down.

I found it by pressing on psu while backlight was on, the loose connection would cause the b/light to flicker.

I figured wth and soldered a wire from ground plane to the metal tab to make sure it has a good connection.

It now turns on everytime, tapping on psu has no effect on b/light and cost nothing to repair (I did add better tape to hold tabs down with).

I hope this might help someone searching for this problem, I saw a few posts elsewhere about it but none here.

[ziddey]

Re: Vizio E320AR Powers on then no Backlight

Unreal. I picked one of these up a while ago with similar issues. Got it under the pretense that it wouldn't turn on. Found the remote batteries to be dead and figured that was it. Noticed that the backlight would occasionally flicker-- more violently the lower the backlight was set. So I put it at 100 and called it a day. Worked great for months until the backlight started going out. It was very infrequent, usually going out after the Vizio logo. Sometimes it'd go out after a few hours. Sometimes the backlight wouldn't ever come on. But a few cycles and it always worked.

Saw this post and took it apart again. Last time, I did notice the spring clips, but focused more on the end contacting the chassis and didn't consider the end contacting the board. Found ground pads next to it, and next to the screwholes on the primary side, so I soldered a wire connecting the two. Any issues connecting the primary and secondary grounds? Figure they'd be connected via the chassis anyway...

Anyway, it now works great. Backlight 0 and not a flicker.

Thanks

[ziddey]

Re: Vizio E320AR Powers on then no Backlight

Oh, no edit button. Also worth mentioning that the inverter does not look to be easily accessible. I didn't get too far taking the TV further apart last time, but it looks like there's no need

[gablekevin]

Re: Vizio E320AR Powers on then no Backlight

im having the exact same problem with the same model tv but im having an issue trying to figure out exactly where you soldred the wires between do you think there is any way you could explain it to me a little more noob friendly or show on the picture of the board you included. Thanks