Windows 7: Blank screen after booting if turn on computer with power button

OS : Win 7 Ultimate SP 1

Problem :
I can not log on windows with power button.
So, for the detail :
1. When i turn on my PC (use power button)
2. It's on then go to dual boot menu then I press enter on
windows 7
3. Then, the normal boot appear (windows logo with "starting
windows" text)
4. After that, the screen goes blank, just black screen
without cursor



my vga and ram is ok, I already use the latest driver for my
vga card

I can start my win xp normally (my dual boot is win 7 and
win xp)

I can start my win 7 with safe mode and low resolution

I also can start my win 7 normally after I force restart my
PC with reset button

Sorry, Connection error make double thread posted