HP Apollo 2000 System Maintenance And Service Manual page 68

11. Remove the PDB cover.
12. Disconnect all cables from the PDB.
13. Disconnect the PDB pass-through cable from the pass-through board.
14. Remove the chassis PDB assembly.
15. Using a T-15 Torx screwdriver, remove the RPS link board assembly.
16. Remove the support bracket from the RPS link board.
68 Removal and replacement procedures