Ubuntu Server stops rebooting properly

[echelon-iv]

hey,
im running ubuntu server 10.04, i just installed on an old pc. i was configuring things and i reboot it twice. after the second time ubuntu wont start, it shows the bios screen and then continues like its a normal boot, but after there is a white cursor that just blinks and then the screen shuts off because of no signal. its not the video card because its also unreachable via the network. it had a static ip. i need some help cuz this has happened every twice now and i have had to reinstall ubuntu to get it to work again.

please help!

thanks,

echelon-iv

[echelon-iv]

update. it now says no such disk after like 30 seconds of the blinking cursor. but i had rebooted it twice before with no problems.....wierd