Having been working perfectly for many months, my printer suddenly decided it will only print from the Bypass Tray. I normally use Tray 1 and it is loaded with paper and is recognised in the Device Settings. This is the only tray I load paper into. I've checked the Tray settings and Tray 1 is set to AutoSelect and has a Prioty of 1. I've restarted both the printer and my MAC but to no avail. Every time I send something to print it says "Resorce Required" for the ByPass Tray. If I then load paper into the ByPass tray it will print - but I want to print from Tray 1. Both Tray 1 and the Bypass tray have exactly the same paper settings i.e. A4, White, Plain. Please would someone advise how I fix this so I can print from Tray 1 by default.