|To expand on the response by jam above. The solution is to reset the boot order in the BIOS (setup). I recommend you set it for CD first then HDD0. |
It sounds like the old drive is not bad. You may be able to reconnect it and return to what you had before this problem.
Evidently someone must have changed the boot order.
After reviewing the old thread I see where you have attempted to change the boot order.
It is possible your have two issues which may or may not be related.
If the boot order was/is set for a network boot you can try resetting it to CD then HD.
The disk you were trying to boot to may not be a good disk and that is why you couldn't boot from the CD.
If you don't insert a CD at all the laptop should attempt to boot from the hard drive. The hard drive contains not bootable data so you will get a message for invavid media or similar.
If you get that then I suggest you reinstall the original hard drive and try booting to it.
At some point you must have changed the boot order back to local drives from a network boot setting.