My Dell will not show anything on it's screen when first turned on, nor will the operating system activate. All the cables involving the monitor are connected properly and the monitor itself works, the computer just isn't sending a signal to it. Can anyone help?

Are you getting any beep codes or lights when the computer is first turned on? I believe that Dell use a light code for identifiing problems....look to the dell website for a download of the manual to show what the codes are. If not then this could be caused by a few issues. 1) your motherboard shorted out 2) your power supply has failed 3) the on-board BIOS battery has died and needs to be replaced 4) The Bios has been damaged by improper flashing. In reference to 11/05/2008 "So this is how liberty dies. With thunderous applause." - George Lucas

Did you unplug the power cord from the back of the computer, wait a minute, then plug it back in? "So won’t you give this man his wings What a shame To have to beg you to see We’re not all the same What a shame" - Shinedown

I have tried booting from a CD, and unplugging it and plugging it back in. There are no lights flashing or beeps from the computer at startup either. I have noticed another interesting problem also. Whenever the power is connected to the computer, it starts up, shuts off, and then starts up again and doesn't turn off. Thanks for the replies I really appreciate it.

Is it still under Warranty? It could be a bad Power Supply or a bad MOBO. "So won’t you give this man his wings What a shame To have to beg you to see We’re not all the same What a shame" - Shinedown