My lc-37d43u wont turn on, not lights, or nothing, it was going on and off before nothing

SOURCE: Show Microsoft Power point on Sharp Aquos hdtv

try to right click the desktop and choose graphics options, you will have to select the correct output for your setup. i.e. laptop to monitor, etc etc see if that works,...sounds like you have a connection, you will have to play with these settings until it pops up. worked with a similar scenario, sometimes you have to do stufff twice and it works on the second time not the first, electronics are weird.
keep changing the settings in the graphics options until it comes up the way you want it.

SOURCE: sharp lc-22sv6u won,t power on. no green light.

Sound like the TV is in protection mode. This happens when a part goes bad inside. the TV turns OFF to protect the other parts from being damaged.
Most commonly it's a power supply related issue. A bad capacitor or transformer on the power supply board is to blame.
For a do-it-yourself fixer with electronic experience, a Service Manual is the best for trouble shooting the problem down to the bad part. Normally, you can find it over the internet for less than $20.

SOURCE: my sharp lc 32d42u shut off and won't turn back on

IF YOU STILL HAVE SOUND I AM PRETTY SURE WHAT THE PROBLEM IS...

SOURCE: My Sharp Aquos LC-52D64U shut off by itself, and

sounds like power supply/ohm supplies for repair in uk

SOURCE: sharp lc-37sb24u. Flashing Green Light

Backlight invertor is most likely cause of the problem, in rare occasions defective CCFL lamps could cause similar symptoms. Replace defective parts, reset lamp error counter and you good to go.