I have a HP Pavilion 500a with Win XP Home SP2. Every time I turn the PC on I get a far as the boot options menu (safe mode, last known good config etc..) I select an option and it goes to a black screen then nothing. No O/S. If I turn it off and retart I eventually get it to boot into Windows, it may take as many as three of four attempts.
What I have done so far:
Repair installed XP
Norton Utilities - Fixed some file problems
Memory Test - no problems
Full Hardware test - no problems
HDD test - ok
Defraged - ok
CHKDSK - drive cleaned
CHKNTFS - drive not dirty
Tried starting with no peripherals attached, including internal cards and drives - same problem
I have tried everything I know apart from a complete reinstall, but as this is a clients PC I would prefer not to reinstall at this stage.