Manuals or user guides for your HP ProBook 6550b Notebook PC. HP ProBook 6455b, 6555b, 6450b and 6550b Notebook PCs Maintenance and Service Guide We have the following HP ProBook 6550b manuals available for free PDF download. You may find documents other than just manuals as we also make available User manual for the device HP (Hewlett-Packard) HP ProBook Notebook PC 6550b. Online user manual database. We have 8 HP ProBook 6550b manuals available for free PDF download: Maintenance And Service Manual, User Manual, Quickspecs, Specification, Frequently Asked Manuals or user guides for your HP ProBook 6550b Notebook PC (ENERGY STAR) HP ProBook 6455b, 6555b, 6450b and 6550b Notebook PCs Maintenance and Service ProBook 6550b - read user manual online or download in PDF format. Pages in total: 3.HP ProBook 6450b Notebook PC. 1. WWAN antennas (select models). 15. Hard drive activity / HP 3D DriveGuard LED. indicator. Manuals or user guides for your HP ProBook 6550b Notebook PC. HP ProBook 6455b, 6555b, 6450b and 6550b Notebook PCs Maintenance and Service Guide