I have a Dell studio laptop that keeps rebooting. I turn it on an it gets to the Dell logo and then reboots. You can select the F2 setup option or the F12 Boot options but this does nothing. If I select F12 then try to select diagnostics it reboots, whatever option it just reboots. I tried to start it in safe mode by pressing delete this did nothing just re-booted and also pressing F8 again nothing. I tried to boot the Dell windows CD that cme with the laptop but nothing it sounds like its trying to start but reboots before anything happens. Pleas can you help me.