When i turn on after a second it comes turn off

check out inverter board that powers backlights.

"Hello, Sounds like you have a bad monitor, or video cable, replace."

check the oscillator

Generally, the maintenance light should come on for a few seconds, then go off after the car has started. All of the dashboard warning lights do this so driver can tell they are operational. (Should see brake light, low oil pressure, airbag warning, etc. Any of the lowly "idiot" lights should come on.)

As a test, turn the key on, but not to start. All of the lights should flash on for a few seconds, sometimes in sequence, then go out. Now, sart the car, some lights may come on and back off. If none stay on after a few seconds of engine running, you are probably ok.

Hi ,
The monitor flicker problem. The monitor when turn on will display image for couple of second then turn black. The monitor status led is still green. This will happen each time it is turn on. The symptom at appear to come from the inverter board.

turn tv on picture comes up 2to3 seconds later tv blacks out then stand by red light flashes 4 times in a row repeatedly..can not turn on or off when stand by light starts flashing but before tv blacks out you can turn tv on and off repeatedly and picture and sound work.You have to unplug power cord for 30 seconds after stand by light comes on to get tv to turn on.

I have the same problem with my 37" HP which is the same as Sharp Aquos, it's bad backlight inverter boards, the screen comes on for a second then nothing, no menu, no channel change indicator then turn it off and you hear the clicking of the power supply about 10 seconds after.

sounds like a bad backlight

goto maxentuse.com, open user manual and look under troubleshooter.