My `Ole` Desktop Appears to have Died

[CAG43]

My `Ole` computer shows no sign of life. Maybe its dead or maybe its fooling me. :sarc:

When I removed the hard drive and put it in another computer and it worked; so the problem was not the hard drive.

I have it plugged into an electric outlet and even though the electric outlet is turned-on there is no sign that my Ole`OptiPlex 360 it is getting electricity . :sarc: What should I do next to determine why it is behaving this way?

 

[Megahertz07]

For how long you didn't use it?
Start checking the PS.
Some power supplies has a main switch on it.

 

[mrjimphelps]

Check your CMOS battery. A bad CMOS computer can make the computer appear to be dead.