short answer.
g450 manual has a short section on booting in safe mode, setting res.
to lowest, and then rebooting. usu. necessary when some h/w s/w change
has a problem.
else, make a barebones setup and try again. ghost to mirror boot
partition. start with reset BIOS and no adapters. if you cannot get
the board to start in this case, then perhaps there is a real h/w
problem.
a fresh OS install seems to be in order. for so much trouble, make
sure to reset the h/w too. and i forget how the intel drivers for the
chipset are to be installed?
good luck.
>> Stay informed about: G450 with Windows 2000 problem