SOURCE: Screen goes black after couple seconds on my Polaroid 42" LCD
I had a TLX-4240B 42" Polaroid LCD TV and the screen would go black after about 10 minutes. There was still sound. I removed the two covers exposing the circuit boards behind the TV. I powered up the TV and waited for the screen to go black (I was going to start trying to pinpoint where the issue was with my trusting meter) then noticed a red light would come on when the screen would go black. there were 4 mini switches right above the red light. I switched the one that said burn and the TV has been working great since. good luck and let me know!
SOURCE: no picture on 32" Polaroid
Your inverter boards need to be tested and serviced, these are circuits designed to control the light behind the LCD glass panel. It could also be the power supply not feeding 24volts too the inverter circuits. In that case the power board would need servicing.
Take it back if its under warranty if not get it serviced at your local repair center..
SOURCE: Blue LED light comes on but nothing else happens when turned on
It can be the main board or the power supply,
look at the power supply first since it is easier to get to, look for burnt parts, bad capacitors, etc.
http://en.wikipedia.org/wiki/Capacitor_plague
Please post back what you find
SOURCE: polaroid LCD TV Model 3200 - Will not turn on
you have a power supply problem.. I have fixed serveral tvs with this problem. normally you have to replace busted capacitors in the power supply board.
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