|The bars on the screen are generated by the monitor and not the computer.|
Did anything happen to it or did you make any changes to it between the last time it worked ok and the first time it didn't?
You don't hear any fans or drives spinning up--not LEDs flashing? Any beeps?
Emachines have historically had lousy power supplies. So, as already mentioned, PSU failure is the most likely cause, especially with the minimal information given.
message edited by DAVEINCAPS