Question about Vizio SV420XV 42 in. LCD TV
After I turned on my TV and adjusted the sound, the screen changed to a mass of blue and green lines. The main remote to the TV doesn't respond, and the buttons on the TV don't respond. The commands to/from the cable box all go through. The sound is working normally. I have Time Warner cable, and my TV is connected through an HDMI cable. My first objective would be to turn it off. How would I go about doing so?
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Posted on Jan 02, 2017
Old messages and bcipollina is gonna get to read this resonse twice; sorry-
If it just fails to turn on or ignores the remote, the main power supply is probably at fault and without some technical background and a couple of test instruments, you will not be able to do the repair yourself.
What you can do though is; unplug the set, let it stand overnight or at least several hours, remove the back panel and look for a separate board with mostly larger components on it; it will have a ferrite core transformer on it and several larger capacitors which are cylindrical and mounted vertically to the board.
Before touching anything inside, especially on that board, allow several hours to be safe since the larger capacitors can hold a painful voltage charge for some hours.
If you see signs of overheating such as discoloration of the board material, it may not be repairable but if you can find a part number on the board, you might be able to buy the power supply and install it yourself.
If there are no signs of heat damage to the board, there may be companies offering to repair it as a subassembly instead of repairing the whole set which could be much more expensive.
If you choose to replace or have it done, the power supply still may not be at fault since most are capable of switching on and off if a downstream problem is causing an overload.
BTW, from what I have read about Vizio, I think they are close relatives to iLo which was also sold by Wal-Mart.
Quality control anyone?
Posted on Oct 25, 2008
I read in another forum where Vizio sometimes uses Vidtech codes. I got 0205 to work on my new Vizio V037L with my Verizon FiOS remote (Phillips RC144).
Posted on Feb 19, 2009
Try this combination.
1) Start with the cable box turned on and TV on tuned to the cable box.
2) Press the POWER button for the cable box and then quickly press the MENU button.
3) This should bring up the user setting menu. Use the arrow keys on remote to go to Closed Caption and press right arrow button this should bring up the closed caption menu.
4) Press the OK button and this should either turn CC on or off.
5) Once Closed Caption is turned off press LEFT ARROW button to return to User Settings Menu.
6) Press the POWER button to turn the Cable box back on and the Closed Caption should be gone....
Posted on Jan 19, 2010
I had the same 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.
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.
HOW I FIXED MINE:Look through the back vents for a white light to make sure the backlight still works. 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.
For me the part number was either (depending on the vendor) : 0171 2272 2174 or it was 3632 0212 0150. Check your circuit and see if any of those numbers match up.
Posted on Jan 22, 2010
LCD's use a colorful crystal see through display which only visible when light is shining through it. if you have sound and no picture it's always a faulty PSU. Very easy to change out actually.
Posted on Mar 27, 2010
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