How can I manually check for paper jams when encountering a 5B00 error?

First, power off the printer. Open all access doors, including the rear access panel, duplex unit cover, and paper trays. Carefully inspect each area for any torn or crumpled paper fragments. Use a flashlight to aid visibility. Gently pull out any visible paper, avoiding tearing it further. Refer to your printer's manual for specific access points.