* THIS WILL ERASE ANY CUSTOM PROGRAMS, SETUPS, SETTINGS, OR SEQUENCES. It will NOT erase any ROM objects you have.

On the K2000 or K2500:

Press Master, choose Reset, answer Yes, Yes.

On the K2600 or K2661:

Press Master choose MAST2, choose Reset, answer Yes, Yes.

In both cases, the machine will reboot itself and does not require to be powered off and back on.