I'm FN - purchased an HP EliteDesk 800 G6 micro from eBay. Seller did not state it was BIOS locked & showed system logged into Windows 10. System is BIOS locked. Ground PIN 2 on a specified chip caused the expected power LED colors (5 x red long & 7 x white short flashes) & beeps. BIOS admin password is not cleared. Now considering some of the options on this site.