Have you tried 'reset config data' in your MB bios.
If that fails turn off pc and unplug from mains, then reset the bios, clear cmos (always previously make a note of any speacial bios settings you had that you may wish to reuse lest you forget)
If that fails turn off pc and unplug from mains, then reset the bios, clear cmos (always previously make a note of any speacial bios settings you had that you may wish to reuse lest you forget)
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