I have a HT 20SII Seiko control
seem to get something about SP 23 alarm
I know how to rest this but the problem is the small keyboad under the monitor
keeps locking up I can shut down start up then sometimes it works
but will eventually lock up once I can get keypad to work I can reset parameters to
clear alarm but then keypad will sometimes lock up
difficult to set up machine without keypad
once set up machine all operates fine