Lexmark T420 User Reference page 27

Jams under the print cartridge
Since the jam may occur farther back in the printer behind the print cartridge area, you may need to
reach in farther to remove the jam.
1
Open the upper front door.
2
Remove the print cartridge. (See
CAUTION:
The rear portion of the inside of the printer may be hot.
Note: The ends of the print media may not be visible.
Removing the used print cartridge
27
for instructions.)