Laptop does not shutoff, keep booting back on its own

[bosebose]

I have a dumb question. I tried to install different variation of the distro (Kalyway 10.5.1, 10.5.2, Leo4all v3, iATKOS v4i, iDeneb 10.5.5) on to my Sony VAIO VGNCR420E which has GM965 ICH8 X3100. No matter which distro was installed, I could not get the video to work QE, CI so I decided to settle with VGA for now. But whenver I "shut off" the PC, it keeps booting back on its own like I was using "restart". Only way I could shut off is press and hold power button. Is this normal for the laptop? because my desktop does not do this.

If there is any fix for it, please let me know.

Thanks in advance.