Manually feed unknown letter hp laserjet p3015

why does my hp printer keep defaulting to tray 1
manually feed output stack
manually feed prompt
hp laserjet enterprise m605 manually feed output stackhow to make tray 2 default hp laserjet
how to disable manual feed on hp printer
printer will not print automatically. i have to hit the ok button
hp laserjet manual feed

LaserJet M always defaults to manual feed ? Tray 2 and Tray 3 are loaded with letter, plain. All print jobs prompt to feed paper in Tray 1 unless Manual Feed is