I have bought a sharp lc40le820m led tv for about a month & whenever i set the fine motion advanced feature of the tv at high, i still sense some motion blur & when i push the DISPLAY button on the remote, the disply window on upper right hand corner of the screen shows 50hz(despite HIGH selection on FINE MOTION ADVANCED feature which i expect it must show 100hz).is that a problem or not.thank you in advance

SOURCE: when adjusting advanced video setting(auto-motion)

The Auto-Motion system analyzes the image and tries to provide the best antialiasing to the image - it's purpose is to make the image look smoother. Unfortunately the image processor inside your tv that does this job is quite weak and the firmware that runs it is badly written so it doesn't always work as it should.
There is nothing you can do - the tv works as it was designed to do - nothing is defective or badly adjusted. Just that it's not good/powerful enough to provide the best image every time automatically.

SOURCE: I ve Sony Bravia KDL55EX713

Your TV is in store demo mode.

To fix this, access the TV's menu and find the option to run initial setup. At the beginning of initial set-up, you'll be asked whether or not the TV should be put into Home or Retail mode. Choose Home.

SOURCE: Sharp LC37D44U Power LED was flashing green. TV

I had the same problem. all the service reset would only make the display come on for a few second with no "k" on the screen - only the channel would show up. I purchased a complete set of board for the lcd on ebay, and started swapping them one by one. The inverter boards were the culpret. Tele working 100% since that board swap.