Hard drive failure, new hard drive won't boot

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Hard drive failure, new hard drive won't boot

Toshiba Satellite A665
I bought this laptop 14 months ago, last month the laptop refused to boot. It would say:
Isolinux disk error 05, ax4250, drive 9f
Boot failed

Often times on boot it would just show the black screen with a blinking underscore.

I tried all my known methods and nothing so I took it to a couple of shops. Both said that the hard drive was beyond repairable and not recoverable.
So I bought a new hard drive, installed it with the Toshiba recovery media. The recovery and install on new and drive went well. Had to restart, and upon restart, the original problem came up again- black screen with blinking underscore. I am unable to boot up. Any suggestions?

Thank you all