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HP Recommended
ProBook 430 G5
Microsoft Windows 10 (64-bit)

Hello, I bought second hand laptop (HP Probook 430 G5). This morning i went to Service Centre because my audio didn't work. And when i was there, the CS ask me the password of BIOS. She said my BIOS protected by password. And i don't know the password. It impossible to ask the first owner because i bought it by online. What should i do? How do i know my BIOS password? 
Here the display.
e62b5869-840d-4279-835c-1a526167afeb.jpg

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