For Your Consideration I have a Vizio VO32L FHDTV 10A That has standby and powers on via the power button but has no picture or sound and will not power off (must be unplugged ).
Let me start with the history of repairs, I got this one a long time ago and if I remember correctly it was DOA, no power, no standby. I recapped the power supply (if you look at the picture I had to slightly mod the heat sink to accommodate the taller caps. I put it back together last year sometime and it did exactly what it does now. Standby Light is on at Plug In. Power on with the set button, logo turns white, I dont hear a relay click, but I have my voltages, even have the 24v for the lamps running while it is powered on. So when I first had this problem immediately after fixing the PS I disassembled the cover to the power board, etc to check all voltages and turned it on in the middle of testing things and Voila, IT WORKED. several times for sevral hours at a time I tested it and it worked. So I put the back on it loosley and set it on the shelf waiting on the bedroom TV to go out.
Recently I wanted to put it into service so i took the back off and put all covers on and all screws where they go and when it got to its destination, BACK TO HAVING THIS POWER PROBLEM AGAIN.
SO as it sits right now, it is having the same problem. Plugs in, has standby, powers on, No Screen, No Sound, and cannot power off unless it is unplugged. I fiddled around with tightening board screws and trying to see if I had a loose cable or a ground issue and I am pretty much stumped. Trying to avoid buying a board because they are either in short supply or being sold as is. Any Help is Appreciated I THANK YOU GUYS SO MUCH FOR ALL THE INFO ON THIS FORUM IT IS PRICELESS. THANKS IN ADVANCE.
Let me start with the history of repairs, I got this one a long time ago and if I remember correctly it was DOA, no power, no standby. I recapped the power supply (if you look at the picture I had to slightly mod the heat sink to accommodate the taller caps. I put it back together last year sometime and it did exactly what it does now. Standby Light is on at Plug In. Power on with the set button, logo turns white, I dont hear a relay click, but I have my voltages, even have the 24v for the lamps running while it is powered on. So when I first had this problem immediately after fixing the PS I disassembled the cover to the power board, etc to check all voltages and turned it on in the middle of testing things and Voila, IT WORKED. several times for sevral hours at a time I tested it and it worked. So I put the back on it loosley and set it on the shelf waiting on the bedroom TV to go out.
Recently I wanted to put it into service so i took the back off and put all covers on and all screws where they go and when it got to its destination, BACK TO HAVING THIS POWER PROBLEM AGAIN.
SO as it sits right now, it is having the same problem. Plugs in, has standby, powers on, No Screen, No Sound, and cannot power off unless it is unplugged. I fiddled around with tightening board screws and trying to see if I had a loose cable or a ground issue and I am pretty much stumped. Trying to avoid buying a board because they are either in short supply or being sold as is. Any Help is Appreciated I THANK YOU GUYS SO MUCH FOR ALL THE INFO ON THIS FORUM IT IS PRICELESS. THANKS IN ADVANCE.
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what did we say about hoarding too much stuff and depriving others of them?! *cough* socialism *cough* lol! 
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