MMPC Model 10/20 (250-1640/41) Resetting the Computer Faxback Doc. #2566 Press CTRL+ALT+DEL when you need to reset the computer. If this key sequence fails, turn off the computer. Wait at least 20 seconds and turn on the computer again. To request the system's self-tests after a system reset, press CTRL+ALT+D after the memory size is displayed. (smc-02/02/94)