|"Not BOOTABLE CD in ATAPI CD-ROM"|
Is that the EXACT message?
If it isn't, tell us the EXACT message, and show whether it's on one line, or on more than one line. .
When CD drive or similar is listed before hard drive or similar in the bios Setup's Boot order or similar settings, some bios versions will display a line whether there is a disk in the optical drive or not , e.g.
"Booting from CD"
If the disk is not there, or if it is but is NOT found to be bootable, something is displayed after that, so that the line e.g. then shows
" Booting from CD - not bootable " or similar,
BUT the bios will always (except in the case of some oddball Dell bios versions) then try to boot from the next thing in the Boot Order or similar list.
E.g. if hard drive is next in the Boot Order or similar list, the bios will try to boot from that. If the hard drive is found to be NOT bootable, then you will see a message " no operating system found" or similar - you DO NOT get that message when there is no optical disk in the optical drive.
The bios will NOT try to boot from anything else in the Boot Order or similar list if it detects a hard drive but finds it isn't bootable, however, if it doesn't detect the hard drive at all, it WILL try to boot from the next thing in the Boot Order or similar list, if there is something listed after that.
If hard drive is listed after CD drive or similar, and if there is no disk, or there is a disk but it's not bootable in the optical drive, if the bios doesn't detect the hard drive at all, and if there's nothing listed after hard drive in the Boot Order, the line you would normally see when there is no disk, or there is a disk but it's not bootable in the optical drive, will still be on the screen as the last line(s) displayed.