Hi KehViN9,
That's terrible! Here is a link to show you different ways to go to BIOS if the issue still persists then i suggest that you bring the unit to a service center for further assistance.
https://us.en.kb.sony.com/app/answers/detail/a_id/44078/kw/how%20to%20access%20bios/c/66
Regards,
Jen
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