My VX32L looks good when first turned on. After about 30 minutes it turns off (no picture, no sound) and the VIZIO power indicator goes black. It will only come back after leaving unplugged for several minutes. Then it will stay on even shorter. Also, If I leave plugged in overnight, the amber power indicator (standby mode) won't stay on overnight. After ~8 hours I come back and it is black. The TV worked great for 15 months, now it won't stay on for more than 30 minutes. Is there any known fix for this? Bad power board? or Main board? Don't want to order the wrong $100 part.
Your message is pretty old but I'll give you my un-copywrited spiel anyhow;
If it just fails to turn on, 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.
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