This article explains what to do when any of the POS printers stop printing

• Check if they are connected to power (the lead may have come loose from the power source)
• Check if the paper needs replacing – IF NEITHER OF THESE ARE THE PROBLEM PROCEED BELOW
• Double click the home button on the iPad
• Slide up and close the Lightspeed app
• Reopen the Lightspeed app, this should fix the problem

NB:  Provided your router is on and operational the printers will print even when Lightspeed is offline and the internet is down. Lightspeed and the printers operate via the WIFI connection