Posted 06 February 2011 - 08:41 AM
All computer systems will boot without a hard drive, the hard drive is a device that would contain a bootable medium, such as an operating system.
The computer's BIOS is the first thing that boots up the computer and displays the text on the screen.
Without a hard drive, the BIOS would simply report in text on the screen, NO SYSTEM DISK or NO BOOTABLE SYSTEM DISK.
But the BIOS will still start the computer regardless of whether there is a bootable disk or not.
If your system is not starting up, there is another issue, such as a power supply problem that needs to be addressed.
Hope this helps clear up the mystery.
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