C8 74LS42 LOGICWhen drive powered up, spindle motor runs continuously. Red LED may stay on, or flash three times and go out.
UB3 325302-01 DOS ROM 1When drive powered up, red LED flashes 2 or 3 times repeatedly.
UC3 6522 VIA (SERIAL INTERFACE) Drive powers up and resets normally. When LOAD is attempted, screen may indicate "SEARCHING FOR ...", but no motors run and red LED doesn't light. Computer is locked up until turned off or reset.