my problem solved.
i replace the better monitor (around $400), then login screen is appear.
my analysis:
1. this happened, because I think win8 safemode use bigger solution.
2. the cheap monitor before (below $100) don't support best auto res.
3. cable resolution analog vs dvi.
other solution...
thanks to guru genet, great solution.
but its did not work for me either.
my fault are set safe mode from msconfig.
so everytime i boot, pc go to safe mode.
and the problem are, when boot from beginning,
the monitor send message out of range.
monitor blank and i cannot do anything.
I am try do safe mode at windows 8, but monitor tell out of range.
and now I even can not login to windows 8..
what I can do? need help asap, bozz pc.
now I hate win8