my xps 720 will not boot , freezes on Dell Bios screen A06 , diag lites 2,3,4 remain on , the bios screen starts then freezes at about 1/4 of the bar. any one have the Canadian XPS support phone number , thanks for your help.
2,3,4, possible usb issue. disconnet all external and if you have a card reader that too usb devices. see if it will boot.