Figure 1-102 Release the right cover (outer)
2. Slide the cover up and away from the printer to remove it.
Figure 1-103 Remove the right cover (outer)
Step 2: Unpack the replacement assembly
1. Dispose of the defective part.
NOTE: HP recommends responsible disposal of the defective part.
http://www8.hp.com/us/en/hp-information/environment/product-recycling.html
ENWW Removal and replacement procedures 93