Thank You for using this service
Welcome to justanswer
Does it make a click?
Could you please supply model number usually found on the back please?
Do you have any blinking LEDs when it shuts down if so which ones temp/power/lamp?
If you do get it going does it then stay on ok ?
First suspect here is the lamp
You need to take lamp out and examine it
It may be obvious the lamp has failed it may be white or black
Look at the filament in the middle for meltdown
http://www.partstore.com/Model/Hitachi+Ltd/Hitachi/50V500A.aspx please obtain the Hitachi brand
Please let me know what happens or if you dont know how to get lamp out
anthony I finally found the lamp it was in the front panel of the tv .Yes it is broken I will order the part on line.
If you feel I have helped you would you please press accept and leave positive feedback for me as this is the only way I get paid something for my time