I had a power outage!

don't leave it on and have it looked at---most likely is if it uses a lamp that may be the problem but if not it may be in the power supply.

first of all what kind of computer is i mean brand? secondly sounds like the power supply went bad..

This TV has a Power Standby feature (pg. 40 of your manual) which allows you to more quickly turn ON the TV. When power is lost and then restored, your TV will display the HP logo screen while it boots the digital circuits. After it is finished, (unless it was previously turned on) it should appear to be OFF. This is normal operation. If you like, you can change this setting to LOW POWER. At this setting, each time you turn on the TV, you will see the HP Logo screen and picture/sound will appear after 20 seconds. Again, take a look at pg. 40 of your owners manual for more information.

Unplug the power cord for a couple minutes and when you power on again, hold the power button for a few seconds until you hear a beep. There may have been a surge with the outage that has hurt the internal power supply requiring a shop repair if the power doesn't return.

It powers up but no picture? In my experience with Hitachi TV's this has been an issue with the convergence IC's failing. You will need to have a technician replace those if needed.

Bad caps in the power supply must be replaced .

next time dont leave your tv pluged on power, the power supply got burnt, check your power supply on the following components
fuse, power transistor, zener diodes,also rectifier diodes
if you can manage do it at home
or take it to a w/shop

You need to reset the time after a power outage.  Press the Day/Check, Hour, and Minute buttons until the correct time is heard-- Press Day/Check until you hear the correct day announced. Then do the same with Hour, and then Minute. 

at this point the only thing you can do is take the back off and check to see if any fuses are blown.

I think you have a short somewhere inyour set most likely the horizontal output transistor which may have shorted by the high voltage transformer going bad. The faint ticking sound that you hear is the power supply trying to start but the shorted load won't let it. Stargazer