Tray 2 Cannot be fully inserted in to HP M451dn color printer; seems blocked by something inside pri

[CAOgdin2]

I was cleaning my printer, and tried to reinstall Tray 2 (the top-most paper tray that pulls out), and it cannot be inserted for the last 2-1/2".  It appears that some additional other (internal) hardware--(with a green pull-grip-I've never used) above the Tray 2 space has descended, and is blocking the path.  Any ideas on how to put my printer back together?

Please send me email (below) if you can help me fix this problem, or call me at [Personal Information Removed], if you can guide me through the remedation.

Carol [Personal Information Removed]

[Personal Information Removed]

[Valsimot]

The duplex probably descend, just use your hand and push it upwards it will click to it's place.