C451 not recognizing paper in tray 1

[Lasersupplies]

I have a Bizhub C451 that I have been having a lot of problems with. When I put paper into tray 1 it doesn't recognize that there is paper in the tray and doesn't attempt to lift the paper. I have already swapped the tray out with no joy. All help would be appreciated.

[EarthKmTech]

chekc that the black lever that is on the rear of the feed unit that drops the feed rollers down when the tray is inserted isnt snapped off.

VERY common.

[Lasersupplies]

Worked a treat thank you very much