1. Green light on printer means power is present. Start with the basics - is it a thermal (Omni) printer and regular paper loaded by mistake? Then do a printer head self test - turn off power, hold down LF button, turn back on - printer should print a random pattern. Then try turning off printer, then turning off JO, wait 10 sec, then turn on JO, then printer. If none of these work, printer data cable could be bad.
2.
Door not opening could be the dry relay used to send signal to
door operator and open
door - Y50 located in upper right corner of J2 in bay.
100 <ENT> 8 <ENT> 1 <ENT> at J0 to see if Y50 is coming on at card in JO - track 24VAC from JO output card to relay coil. If 24VAC present at relay coil, relay is probably bad, especially if you have the old style (orange) relays. Try reseating relay or you could change with another to test.
Door not closing, ensure X44 (entrance
door eyes) and X45 (exit
door eyes) active at J0. 100 <ENT> 20 <ENT> also gives
door state, useful when you call your distributor for tech support if having problems.