I've got a Polaroid FLM-3701 LCD TV. I have had the TV over 4 years and it's worked great. Recently it's starting to shut itself off. I say "shut off", actually the picture goes off, the power light changes from blue to red, but the sound is still there. I can turn it off and back on again and it'll play fine for however long. Any ideas as to what might be wrong or what might be going to happen??

Polaroid FLM 3701 User Manual Page 10
Here is the manual

It looks like your power supply might not be providing enough current to get the LCD to power up. This LCD needs about 3 to 4 amps to work properly.

There is a fuse on the power supply board. It is labelled F1. It is a small cylinder near the AC connector. The F1 fuse is 5A 250V. How ever, capacitors are more likely to fail on this television.
The Polaroid FLM3701 has a problem with capacitors failing on the power supply board. If enough caps go bad, you will get no power. Not even a power light. Any capacitor that is swollen is bad.

The power supply fuse should be next the the ac input plug on the power supply. It should be a long cylinder type fuse, probably a T6.3AH/250V. You will want to replace those caps ASAP

No because it is a monitor only; meaning it does not have a TV tuner of its own.

In the Polaroid FLH-3701, the fuse is located on the power supply board, next to the AC power connector. It is a small black cylinder. It is labelled F1. Value is 5 amp, 250 volts.
A fuse does not blow for no reason. Most commonly a fuse will fail because of a short someplace on the board. I have this same TV. The fuse blew. The reason was transistor Q6 had shorted. There are two identical paired transistors on the output side. Q6 and Q7. They are both Infineon 11N60C3 MOSFET transistors. Check those for a short. There may be a burnt smell.
More commonly, this TV will fail because of bad capacitors on the power supply board.

you are trying to use a monitor as a tv, you will need a tuner to get a pic, use a cable box or digital to analog tuner to get something

Expensive!
http://www.technotronic-dimensions.com/Products1.html
Cheap but not in stock.
http://tv-part.com/index.php?target=products&product_id=768
Try fixing it?

i fixed one by put 2 new caps in c112 and c113 1000uf 10v

this happens to my tv as well it simply will just shut off and turn itself back on and then shut itself off every 2 - 3 minutes...can someone help??