Vizio e550vl went black then blue screen with no signal done this twice. Now when you turn the tv on it flickers with no picture or sound and will not turn off until you unplug it.

SOURCE: Vizio 42", have picture for about 5 mins then screen goes black.

also check the power cord wire coming from the back of the tv is loose from the tv side or perfect.

SOURCE: no picture or sound, light comes on in the front and have to unplug tv to turn it off.

I had this exact problem on my Vizio 47" HDTV. I removed the speakers and all the screws on the back cover. Took the cover off and located the fuses on the largest circuit board. The are in the upper right hand corner of the board. There are 3 of them in a row labeled LF 1.5, LF 3.0 and LF 3.0. The are white in color with copper ends. I took a volt meter and measured continuity across all fuses individually and found the LF 1.5 to be blown. The guy at the electronics store sold me a barrel 1.5A fuse and told me to soldier it across the top of the blown fuse. It took an extra set of hands but the TV works perfectly.

SOURCE: VIZIO TV Black screen. Cannot turn off TV without unplugging.

I had a similar problem after having a Vizio for 2 and a half years. I left the room for a minute, i came back and the screen went black. I didnt hear an arcing sound though. There was still power to the unit and you could see that the back light was working, just no picture, no sound, and you couldn't use any of the buttons. The only way to turn it off was to unplug it. It would then start up, with the Vizio logo going from orange to white, and then do the same thing all over, no pic or sound. I would check the ceramic fuse first on the board that gets power from the plug.

HOW I FIXED MINE: I ordered a new "main PCB" from tigerdirectparts.com (you can also use searspartsdirect.com). This is the circuit board with all of the inputs on it (hdmi, cable, etc.) I opened it up, disconnected the old one, put in a new one and now it works fine.I used both serial numbers on the board to search for it online. It cost me $144 to do it, but that's better than $450 for a new TV. My tv is the vx32l hdtv10a. I hope that helps.

SOURCE: We have a Vizio model # GV47LFHDTV10A. When we

For the cheap guy like me who will probably do more harm than good:
Also check for the F3 Fuse on that same main input board. It is located in the upper right corner. Hard wired fuses; very small. You will see F1-F4 (F4 is empty). You can solder a replacement fuse right over it. I would recommend piggybacking the fuse with a fuse you can replace. Will need the holder and a new fuse. 6 bucks.
Doesn't solve problem, but I can go another 2 1/2 years and the wife won't blame me for screwing up the TV in the first place.

SOURCE: I have a Vizio P50HDTV20A. I came back from a

My guess from this little information is the buffer boards are bad. The Y Buffers... (3 boards, main, lower, and upper should be checked). The main buffer could just be out, but usually when we replace one, we replace all three. If you are tech savvy and are going to try to fix this yourself, I would start there. Here is a pic of the Y main.. Part # LJ92-01399A . the Y lower and Y upper are connected to this.. Usually on the left side of the TV (from the back).

There is a fuse on this board, so it could have blown, but more likely, it's time to be replaced.

The Upper and Lower Y Buffers are part #'s LJ41-05121A and LJ41-05122A. I recently replaced mine on my Philips Plasma and it's been working fine since!
Good Luck!

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