Fujitsu PRIMERGY TX2550 M4 Upgrade And Maintenance Manual page 66

Basic hardware procedures
Figure 17: Removing the front cover (floorstand model)
Ê Pinch the locking clips to disengage the front cover (1, see close-up) while
slightly pulling out.
Ê Carefully fold out the bottom end of the front cover (2).
Ê Unhook and remove the front cover (3).
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Upgrade and Maintenance Manual TX2550 M4