Model UN75H6350AF. Why doesn't it turn on?

Ebay lamps can cause this as they are not originals also the balast supply, is gas discharge type, can fail.

This is caused by the power supply detecting an over current condition. The condition could be a bad LED in the back lights. Since you did not post the exact model number, that is all.

Replace the lamp would be the first thing to try. Lamp door switch on this model is notorious for going bad. If you replace lamp and still won't turn on jumper door switch. If you take off back you can see switch board.

Ur high voltage is dying.The block of plastic with a red wire with a cap hook to ur CRT(tv tube).The FBT,it call the Flyback transformer,that is dying.That must be replace.

Thats the error for lamp driver error. Which means the Ballast is most likely defective. You can get the replacement ballast for your model at the following link which comes with installation instructions.
http://servicemanuals.vstore.ca/product_info.php/pName/kdfe42a10-ballast-assembly/cName/sony-parts

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.

hy i got a toshiba 42" LCD tv ,when i press the power boton
iget the red light,& it stay that way ontil i pressthe power back off
thanks for any help

how many times does it blink pause then blink again?

is this a lcd projection or just tube projection