Hi buddy,
To be honest I don’t think there is much what you can do. You have tested both recovery disk and a new HDD but the same happens. So this would mean it’s hardware related problem.
Toshiba recovery disk contains a pretested image of all drivers and tools. That means you can always install Windows from recovery disk and it will work. If not (as in your case) it something wrong with hardware.
If your notebook is still under valid warranty you can bring it to an authorized service provider in your country and the guys can fix this for free due to warranty. Get in contact with the technicians and explain your problem, they will sort it out for you.
