When all else fails read the owner manual page 35:
"• To unlock the buttons on the remote control by using the
touch sensor panel of the main unit (see page 25):
1 Press MENU to display the MENU screen, and then
press VOLl/k to select "System Options".
2 Press CHs/r to select "Operation Lock Out", and
then press INPUT.
3 Press CHs/r to select "Off", and then press INPUT.
4 Press MENU to exit.
• To unlock the buttons on the TV, press MENU on the
remote control, and then select "Off" in "Operation Lock
Out".
Took 5 minutes to find the manual for this unit. GOOGLE
SOURCE: Problems w/ Sharp LC-46SB54U remote programming
i will help with the easiest way, hit the TV button, then hold the setup button untill the light blinks twice, then hit 991, it will flash again, hit the 1 again, then hit power, then hit the chanel up button, and if it dont shut off, hit the chanul up button again, keep going this every 2 seconds(with the chanel up button) untill the power shuts off, when it shuts off, hit the setup button again, that will lock it in, hit the power button again-TV should come back on, if that dont work, use the volum up button , after doing the first few steps, hope this helps
SOURCE: Cracked Sharp LC-46D62U lcd panel.
look up your local repairman they should have part.The part it should cost about $150,labor must ask.
SOURCE: Sharp Aquos LC-37GD6U 37 in. HDTV LCD.
Try to check the program if its not auto OFF and its not try to check the wires or the power chord.
SOURCE: Problems with Sharp Aquos LC-46D62U 46 in. HDTV
Sounds like an impact to the screen. Screens can't be fixed.
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