Dell Dimension 2100 System Reference Manual page 5

Invalid Boot
Diskette
KB/Interface Error
Keyboard Error nn
No ROM Basic
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The operating system cannot be located on
drive A or drive C.
An error occurred with the keyboard connector. The keyboard or
The BIOS has detected a stuck key
represented by scan code nn.
The operating system cannot be located on
drive A or drive C.
Enter the system setup program
drive C is properly identified.
system board
Make sure that nothing is resting on the keyboard; if a key
appears to be stuck, carefully pry it up. If the problem persists,
you may need to replace the keyboard.
Enter the system setup program
drive C is properly identified.
and confirm that drive A or
may need to be replaced.
and confirm that drive A or