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September 25th, 2019 19:00
Optiplex 780 locked BIOS
I just purchased a used Optiplex 780 MT motherboard off ebay and once installed in my case and fired up I found the BIOS locked. I don't have any clue what the password is to unlock. Is there a way to unlock the BIOS on the 780 maybe remove the battery?
Thanks!
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JOcean
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September 26th, 2019 05:00
Removing the battery should do the trick. The following is additional information.
https://downloads.dell.com/manuals/all-products/esuprt_desktop/esuprt_optiplex_desktop/optiplex-780_service%20manual2_en-us.pdf
https://www.dell.com/support/article/pt/en/ptdhs1/sln284985/how-to-perform-a-bios-or-cmos-reset-and-or-clear-the-nvram-on-your-dell-system?lang=en
glnz
2 Intern
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August 2nd, 2022 06:00
See also this article about something else, but it has steps to move jumpers and go into a different BIOS mode - maybe you can do the same on your 780?
https://tachytelic.net/2021/12/dell-optiplex-7010-pcie-nvme/
bradthetechnut
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August 2nd, 2022 16:00
Just replacing the battery might not reset password if there is one. https://www.dell.com/support/kbdoc/en-us/000126390/how-to-use-the-jumper-to-reset-the-bios-password-on-your-dell-desktop-computer
speedstep
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August 8th, 2022 03:00
@Mrtoyou
780 Password must be cleared after removing Jumper and F2 setting NO password in F2 Bios Setup. Then you put jumper back.
https://www.youtube.com/watch?v=qO2PHtbMHaE
https://www.youtube.com/watch?v=ILVKm5ANgJo