Going inside the BIOS on the DELL Optiplex 780 - YouTube
Restored Dell OptiPlex 780 Tower Desktop PC with Intel Core 2 Duo Processor, 4GB Memory, 250GB Hard Drive and Windows 10 Pro (Monitor Not Included) (Refurbished) - Walmart.com
Optiplex Bios Display Options - Dell Community
Solved: 7010, BIOS corrupted, blinking amber color 2,3 times - Dell Community