Michael Jones, our Chief Technican says:
"If none of the below works, the motherboard may be at fault. Updating or resetting the BIOS firmware can help, but this should be done cautiously to avoid bricking the system. Consult us if you're unsure about performing these steps. By addressing these potential issues, you can regain access to your BIOS and effectively manage your system settings."
Key Timing Issue
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The BIOS key (e.g., F2, DEL, ESC, F10) must be pressed at the right time during startup. If you miss the window:
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Restart your computer and repeatedly tap the designated key as soon as the system powers on.
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Check for an on-screen prompt during boot, such as "Press DEL to enter setup." If the key isn't displayed, consult your PC's manual or search online for the correct key.
Fast Boot Enabled
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Modern systems often enable "Fast Boot," which bypasses traditional startup sequences, including the BIOS access window.
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Solution: Hold the power button to turn off the system completely, then turn it back on while pressing the BIOS key.
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Alternatively, use the operating system to access UEFI settings:
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On Windows, go to Settings > Recovery > Restart Now > Troubleshoot > Advanced Options > UEFI Firmware Settings > Restart.
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On macOS, enter recovery mode by holding Command (⌘)-R during startup.
USB or Wireless Keyboard Issues
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Older BIOS versions may not recognize USB or wireless keyboards until after the boot process.
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Solution: Use a wired keyboard connected to a legacy PS/2 port or a USB 2.0 port.
System Configuration or Hardware Issue
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External Devices: Peripheral devices like USB drives or external hard drives may interrupt the boot sequence.
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Disconnect all non-essential devices and try again.
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Faulty Hardware: A malfunctioning hard drive, RAM, or motherboard can prevent access to BIOS.
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Run diagnostics to identify and address hardware issues.
Locked BIOS
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Some systems, especially in corporate or school environments, lock BIOS access with an administrator password or disable access entirely.
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Solution: Contact your administrator or reset the BIOS by removing the CMOS battery (requires opening the case) or using a motherboard reset jumper.
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Author:
Michael Jones, Chief Technician
Further reading
How to fix "Boot Device Not Found" error
Bad System Config Info
Firmware error correcting codes