NCR RealPOS 5953 User Manual page 41

All unlabeled keys are non-functional in Setup Keypad Mode. Ignore
any stuck key error messages displayed as a result of the keys being
held down.
3. Press the [F2] key to put it into the BIOS configuration routine.
4. Use the special keypad layout to run the system's BIOS
Configuration routine.
Note: The DynaKey Setup Keypad Mode is provided simply as a
convenience feature. If you prefer not to use this mode, simply
connect an external keyboard to one of the DynaKey USB ports to
use for system configuration.
Chapter 3: Hardware Installation 3-17