Two days ago our trusty HP LaserJet 4 stopped automatically pulling legal sized paper from the manual tray on the front. Now it displays MF Feed Legal and the user has to push the "online" button to make it print.

Currently the printer settings are as follows
Printing Menu / Manual Feed = OFF
Config Menu / MP Tray = CASS
PaperSize button is set to "legal"

According to the manual this configuration should allow legal paper to be printed without user intervention.

Any ideas what could be fix this sudden change?