HP BL2X220C - Manual (Page 14)

Operations 14
CAUTION: The jackscrews control the unseating and seating of critical system connectors.
Failure to use the jackscrews to remove and install the server B assembly can cause the system
boards to fail.
4. Engage the threads on jackscrew 1 and tighten six turns clockwise.
5. Engage the threads on jackscrew 2 and tighten fully.
6. Tighten jackscrew 1 fully.