HP EliteDesk 800 G1 Tower Service Manual page 184

b. Press the tab on right side of the panel (1), and then swing the right side of the cage away
from the chassis to remove it (2).
13. Remove the three remaining Torx T15 screws that secure the system board to the chassis.
14.
Slide system board toward the front of the unit until the rear connectors are clear of their slots in
the chassis (1).
172 Chapter 7 Removal and replacement procedures: Ultra-slim Desktop (USDT)