WHEN I START THE PC, NO BIOS LOGON REPORT SHOWS UP!
Refurb HP xw4400 2gb Core2 HD DVD ATI to 2/DVI HDMI monitor.
At first, computer booted directly from blank screen into XP, with reseller/refurbisher logo as screen-background.
Windows7 install disc would not respond.
Used Paragon 12 (partition manager) to re-size C: in order to create new partition for new OS. Paragon needed to exit XP to do this. NEVER came back, and NOTHING happens when re-booting (cold or warm).
EXCEPT that keyboard lights flicker, and usually a short beep follows. Then nothing.
Removed battery for overnight, but no detectable change at all.