I came back from office yesterday night, left my Ubuntu 10.04b1 PC switched on the whole night for an OS update and even though the update as like 30 mins tops, I was so sleepy that I didn't bother to wait that long.
When I got up in the morning, I had to reboot after the update, but I had to cold-reboot for some reason (GNOME was working with wierd characters).
But my machine never booted - and this was not at even the OS level as I was getting this message.
PXE-E61: Media test failure, check cable PXE-M0F: Exiting Intel Boot Agent. No bootable device - insert boot disk and press any key
So no grub or bootloader missing fix etc.
I went to BIOS > Boot
Boot Menu Type : Normal Boot Device Priority : <CD/DVD-ROM Drive> <Hard Disk Drive> <Floppy Drive> <Ethernet> Hard Driver Order : No Hard Disk Drive CD/DVD ROM Drive Order : <PT-TSSTcorp CDDV> Removable Drive Order : No Removable Drive
I opened the chasis (which I should've right in the beginning saving all that time searching for a boot fix), and found that the power cable to the hard-disk was badly burnt !