⟐ Commented August 05, 2025 at 5:11 MST

⟐ Commented February 24, 2026 at 14:47 MST

⟐ Commented January 18, 2024 at 14:28 MST

⟐ Answered March 15, 2025 at 12:21 MST

⟐ Commented April 21, 2026 at 20:24 MST

⟐ Commented October 11, 2023 at 14:09 MST

After this issue the TV started to turn on and off by itself, not just a few times but it continuously does this ALL day, about once a day the TV will eventually turn on and stay on but I don’t hold my breath waiting for this to happen. When the TV turns on the Vizio symbol appears, disappears after about 5 seconds, the screen gots dark and then turns off, this is the ongoing cycle.

Can someone please help, it is out of warranty, we have tried changing all outlets, cords and unplugging and plugging it back in, Tried the method form when the TV is in RGB mode but no success.

Also, when the TV is in its cycle of on and off we cannot turn the TV on using any of the current devices.

Please help, football season is here and this is the one in the living room we use all the time.

⟐ Commented April 22, 2026 at 2:41 MST

Black I can still hear my cable playing

⟐ Answered August 23, 2025 at 21:42 MST

Is this an adjustment problem of hardware issue?

⟐ Commented March 19, 2023 at 18:30 MST

⟐ Commented April 30, 2024 at 13:18 MST

⟐ Answered February 06, 2026 at 4:03 MST

When it happens, there is no picture or sound, the same as if I had manually turned off the TV via the remote, but with one exception: the VIZIO logo on the bezel beneath the screen remains lit, and is 'brighter' than it is normally when the TV is on. Other than the brightly lit logo, the TV appears to be in its normal off/standby state. In fact, if I then press the power button on the remote, the TV turns back on and all is well again (picture and sound) until the next time it decides to randomly turn itself off again.

After doing some hunting around online, I found many other VIZIO customers complaining of similar symptoms, although in most of those cases I the TV either failed completely (wouldn't turn back on), or the user had to unplug the TV, wait 10 or 15 secs, then plug it back in to get the TV working again (I've never had to do that). And no one described their TV's logo as still being lit when the TV failed.

Since most of the failed cases I read about turned out to be a bad power supply board, I went ahead and purchased one online. It was an exact match to mine, right down to the board's manufacturer, part number and rev letter. I went ahead and swapped the boards, powered the TV back on, and within a couple of minutes it failed again with exactly the same symptoms. %#*@.

So at this point I can safely assume that either the problem is *not* the power supply board, or the replacement power supply board I bought online has exactly the same problem as mine (certainly a possibility; I'm sure the board I purchased was used).

I have a hunch that the TV's hardware is ok, that this is some sort of glitch in the firmware. I can imagine there are points in the code where the default action in response to some error condition is to put the TV into the exact same state I'm seeing now. I could test out that theory by reverting back to an earlier firmware level and see if the problem disappears or the symptoms change, but it appears VIZIO offers no way to do that -- not only is there nothing in the TV's menus for loading firmware, but there are no firmware downloads offered on VIZIO's own support site.

I have no service manual or schematics for the TV, so I'm pretty much stuck at the moment.

The problem of course is that I have no way to capture the TV's state at the instant it fails. So checking voltage levels after unplugging the TV and plugging it back in will likely be futile, unless a component is 'on the edge' or out of spec. I could try operating the TV with its back off and, after it fails, leave it plugged in and measure voltages then, but that would be hard to do as the TV is still in daily use.

Because the TV is still in use, any 'try this, try that' type troubleshooting will be painful, as it would mean pulling the TV off the wall, removing the 10,000 screws from the back, testing whatever new steps are suggested, then, short of coming up with an actual fix, reassembling it and remounting it on the wall. So I'm hoping I can get a bit closer to the source of this problem without having to continually open up the TV.

Just an update to my original post:

I was able to locate online a replacement power supply board for my Vizio 42" LED TV (model E422AR). I pulled the back off the TV, removed the old PS board and installed the new one. Everything worked as well as it did before, but the random shutting off problem still occurred. The company I purchased the PS board from were great to work with. They offered me a full refund, or would send me a second board to try, just in case there was something wrong with the one they sent me. I picked option 2 A week later I repeated the process of swapping out my TV's PS board for the new one. Sadly, the problem still occurs.

Here's the thing. I haven't see this problem show up now for almost two months, even though the TV is typically on several hours each day. I don't believe the problem is heat related; there's been plenty of days when the temperature of the room the TV is in topped 80 degrees F. (the vent ports are clean and there's plenty of air flow behind the TV.) I thought this problem might be related to variations in the power line voltage, but my TV is plugged into a UPS (battery), so I doubt that's the cause. I still think this is some sort of firmware bug, but without a way to track firmware updates, there's no way for me to be sure.

Another update to my original post...

It's now been four months since I’ve seen a single reoccurrence of my Vizio TV randomly turning itself off.

Given how frequently this was happening to me before - sometimes several times an hour - it is hard to believe this is simply good luck. I continue to use the TV daily, no less frequently than before.

I’m happy to have the problem gone, but have the uneasy feeling it will be back again eventually.

My only explanation for the problem’s disappearance is that Vizio downloaded and installed a new firmware update on my TV that corrected the problem (I’ve always suspected this problem was either a bug in the firmware or could be corrected in the firmware). I hadn’t been keeping a close watch on my TV’s firmware version number, so it might have changed without me knowing it. Too bad Vizio doesn’t inform you when it installs a new firmware update, or makes visible on the Info screen when the last firmware update was installed. Not such a smart TV after all.

Has anyone else had this or a similar problem simply disappear after a while?

⟐ Commented April 12, 2026 at 21:52 MST

I've tried holding the power button in for 30seconds, a different power cord, disconnecting all devices from the inputs, etc. nothing works.

when it first started happening, if we left it off for a couple of hours or overnight, it would come back on. Now it won't stay on at all.

Also, tried the flashlight test, don't see anything. And I don't get any audio.

Any idea on what could be the issue?

⟐ Commented November 27, 2025 at 8:26 MST

⟐ Answered April 27, 2026 at 16:22 MST

⟐ Commented February 20, 2026 at 17:19 MST

⟐ Answered January 20, 2023 at 14:08 MST

⟐ Commented April 19, 2021 at 14:17 MST

Watching tv and it just went out..waited one day and tried to see if it would come back on and it didn’t I thought it was completely black until I used a flashlight and could use the remote to still do things..I haven’t checked for sound..I’m just trying to figure out is it backlights or should I just get a new tv

⟐ Commented September 01, 2022 at 2:30 MST

⟐ Commented December 10, 2023 at 11:39 MST

⟐ Commented September 11, 2021 at 1:36 MST