I have a Polaroid TLA-01911C. I switched from cable to air and did a scan, but no channels are found. I even hooked up an antenna with no channels found. Any suggestions?

Check and replace its tuner. It is faulty.
If you wish to get some details; check the site linked here. Pull up older posts. Surf the site with patience. http://electronicshelponline.blogspot.com/

Go into the menu on the remote control that came with your TV and set it to cable or antenna setting, depending on which one that you are using now.

Audio amp may be blown. A cable may be bad.
What are you connected to?

http://www.hdtvreview.com/Polaroid-TLA-01911C-hdtv.html

Tv is hook up to cable tv or free DTV air broadcasting?Have a good antenna source hook up or cable or satellite signals.Go into the tv menu go to SETUP.Go down to CH. press enter pick Cable or Air.Enter for scanning,after it done scanning will get all free DTV air or cable broadcasting channels stations signals.

what exactly is the problem?

polaroid LCD has white screen and no sound

Hello,

The white screen and nothing else usually indicates a failure of the filter capacitors in the power supply board. When these capacitors go out the voltages are not correct so the TV can not power up right. You can rebuild the power board by replacing the bad capacitors and this should bring the TV back to life. Here is a link to a repair guide for this power supply board.

http://www.ccl-la.com/blog/index.php/repairing-a-polaroid-tla-01911c-with-a-bad-power-supply/

I hope this helps,
BuddyMc

same (tla-01911c) issue when trying to watch over the air brodcast try rescanning the channels that normally works for me

i got direct tv basic set on my S-video input so i only need over the air when the sat is down (i.e: storms, wind, snow, ...)

I called one-for-all and got a repair number and then sent the remote to them to have the codes added.