I recently found a Polaroid 37" HDTV outside my uncles apartment, and thought I might be able to get it working.  It had some snow on it and some got inside of it so I took it inside and air dried it for a day, then I plugged it in and all and it wouldn't turn on at all so we  opened it up and saw that there were 3 blown caps so we got new ones and put them in but still it won't turn on. 

Does anyone have another solution as to why it won't turn on?  I think it could be the power supply but thats too expensive, so is there any other solution or thing that we can try?

Come on. nobody on this site has even an inkling of an idea?

Check the contacts for the power supply and for the power button for corosion. Since the former gets human sweat and the latter may suffer from oxidation as they get quite warm thats a good start.

I suspect that perhaps the reason for the blown caps is the reason why the TV won't start. The caps may have been a symptom for something else blowing or a power surge as theres no good reason why 3 would blow at the same time that im aware of.

Ok thanks, i'll take a look.

I have an idea. Throw it out! Its broken. Get a new one. Help the economy.

Absolutely horrible idea considering I have less than 20 dollars to my name.  The economy needs to help me before I can help it back...

It was probably thrown out for a reason. If a tv that you found on the street doesn't work it probably means it was thrown out. Considering you found it outside just consider yourself lucky the thing isn't filled with cockroaches. Kid, maybe you should ask for a tv for your birthday. Because I doubt you will find working mint condition electronics in the garbage.

do you have a multimeter? it is almost key to have one if you are going to work on electronics. Heck, if you had one you could easily check if the power supply is bad.

I threw out 2 perfectly fine CRT monitors because I couldn't find anyone who would take them. People throw out working stuff all the time. Heck, I've picked track lights with working bulbs out of dumpsters. I also found a complete stereo system next to a dumpster with working turntable and everything. I should have taken the turntable, but ended up passing on it as I only needed the speakers.

I vote quit before you electrocute yourself. Trying to repair high voltage devices is dangerous if you don't know what you are doing.