HP LaserJet 4610n - Manual (Page 173)

Cause Solution
Media was not stored correctly. Replace the print media. Media should be stored
in the original packaging in a controlled
environment.
NOTE
If the printer continues to jam, contact HP
Customer Support or your authorized HP service
provider. For more information, see
http://www.hp.com/support/clj4610 .
ENWW Common causes of paper jams 161