Why dose my sharp aquos lc-40d78un power on then turns right back off

SOURCE: LC-37D62U Sharp Aquos HDTV Settings

lost sound on Sharp Aquos 37LCD62U

SOURCE: LC-65D64U Sharp Aquos

Call sharp back again and tell them you first want to register for aquos advantage program, which is free. By doing that your service will go much quicker with them. You then tell them that you want to get set up for service. They will have one of their authorized professionals come and fix your tv in a matter of days. If their tech cannot fix it, they will replace your tv free of charge as long as you are within your warranty.

SOURCE: sharp aquos lc-52se94u green screen

If it it new, take it back. The product is not working properly.

SOURCE: how to reset sharp aquos lc-32l400m?thanx before

Sharp Aquos LC-32L450M - i have recently baught this LCD, but I think the 'mpx' ie the multiplex sound is not working. there is this 'mpx' button on the remote, but wen i press it nothing really happens. in the manual its only written in one line "mpx- multiplex sound" . please any one can help me ..I m really not happy wit the sound right now. paid so much & no good sound its bit irritating please any one help.. wats the problem

SOURCE: Sharp Aquos LC-52D64U Won't Turn On

I have fixed many sharp lcd tv's with a reset. If one appears to have no defects like bad capacitors, fried inverters, broken panel, ect. and the power light is flashing steady or not on at all a reset may help. There is a lot of bad information regarding the procedure though. The correct procedure is to unplug the tv, hold volume down and channel up at the same time and plug it in. Release those buttons then push the power button. Did it start? Great! I have no idea why so many seem to need this. If there truly is a problem this will only work temporarily or even momentarily but many will be fixed for good.