HP RP3440 - Manual (Page 180)

10. Remove the system board:
a. Grasp the memory controller chip heatsink and the processor module heatsink and
slide the system board toward the front of the server. This releases the system board
from its chassis standoffs.
b. Lift up the processor module side of the system board and slide it free of the PCI card
cage bay.
Figure 6-67 Removing the System Board
Replacing the System Board
To replace the system board, follow these steps:
180 Removing and Replacing Components