HP BL860C - Manual (Page 143)

Figure 79 Air Baffle Locations
2 1 Processor air baffle Controller air baffle
10. Remove the rear air baffle and the CPU power cable holder from the system board ( Figure 80 ).
Figure 80 Rear Air Baffle and CPU Power Cable Holder Location
11. Remove the TPM.
See “Removing the TPM” (page 140) .
NOTE: The system board is attached to the front display panel.
12. Loosen the two captive thumbscrews toward the back of the system board.
See Figure 81 (page 144) for the thumbscrew locations.
Removing and Replacing the System Board 143