I have a custom build PC:
Corsair HX620 PSU Intel 6870 C2D Geforce 8800GT Asus P5Q-E
I've recently moved from the UK to Canada, upon plugging my UK built PC into the wall socket it gets stuck in an infinite loop of booting and rebooting, the fans spin, internal and external LED's light, but no output to the monitor.
My HX620 apparently will auto select the right voltage, but I can't rule regional issues out, I am using brand new Canadian plugs, straight into the wall socket.
EDIT @ 9:44PM 04/08/2011
Tried the following:
Reseat graphics card - No effect
Remove and replace battery from motherboard - No effect
Disconnect HDD - No effect
Disconnect Graphics Card - No effect
Disconnect CD-ROM - No effect
Reseat RAM modules - No effect
Remove 3 RAM modules - No effect
Swap remaining RAM module with one of the 3 removed - No effect.