No Monitor,keyboard or mouse

[notned]

Please help!!!!!!
I am about to trash my computer. I have a packard bell i media 5167 on windows xp sp2. I have formatted and reloaded xp. everyting working fine until I shutdown. When I restart, computer powers up but no display or keyboard or beep. If I turn off mains, then reboot everything o.k.until I turn off again.
I have tryed a new power supply.Any ideas please

 

[hangintite68]

i would look in the bios and see what they have for configuration.. they could have a setting in there that could've switched or something