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I have a Vizio M420NV The top of the picture is cut off. I have reset picture settings back to default and can't get a normal picture. It's like it's always zoomed in.
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Whether it's incorrect settings or the wrong HDMI® input, there are several reasons why your TV may stop playing sound. ... Media devices like the receiver, DVD player, or gaming console that aren't connected to the TV, due to unhooked cables, ports, or misconfigured settings.1
Performing a factory reset on your VIZIO soundbar completely erases any custom settings and preferences to their original factory settings.
Press and hold the Bluetooth and Volume Down buttons simultaneously for five seconds.
All 12 LEDs will flash three times.
The factory reset is complete.
Back - light problem. Check and replace damaged component/s at its back-light inverter board, or replace this board as card basis. If you wish to get some details; check the site linked here. Surf the site with patience. Pull up older posts. It will be best to replace the inverter board as card basis. http://electronicshelponline.blogspot.com/
To some model sets; especially LED back-lighted types; the back-light inverter circuit will be part of the main power supply board [SMPS]. In such cases, the power supply board might need replacement.
If you wish to get some details; visit the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/
Line, faults & possible causes to LCD screen are given with illustrations. You can get an idea about the fault to an extent.
lightning can do extensive damage to electronics equipment especially flat panel TV's. I would really recommend a professional diagnosis instead of board swapping. You could have several boards that are damaged!
I have a suggestion if you have and are using a box of some kind with this set, remove set and box from power for awhile and then power both back, sometimes a box can trigger this type of event, hope it helps and it cannot hurt to try.
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