GPT partition, no bootable disk, Grub error

Grub bootloader not recognised by old Bios.

Installation of grub 2:

Grub 2 was installed on a 500 GB hard disk with separate home and swap partitions. In the beginning a small partition was left with grub_boot flag to be used by grub for booting. The installation was LinuxMint 15 Olivia. The hard disk was partitioned with GPT and had hybrid MBR table as well. The system return the message ‘No bootable disk’ and refused to boot.

An old machine:

This machine was an old 1.4 gz, core 2 duo Intel, of last decade but in surprisingly immaculate condition.

There was no problem in booting from live CD/USB. Continue reading