IBM System x3550 M5 Type 5463 Installation And Service Manual page 281

Figure 199. System-board standoffs
3. Fasten the two thumbscrews (one is near PCI slot 2 and one is between fans 4
and 5).
System board handle
System board handle
Figure 200. Thumbscrews engagement
4. For 2.5-inch hard disk drive server models, close the system board retention
lever. For the 3.5-inch hard disk drive server models, press the blue release
tabs and lower the battery or power module holder into the chassis.
System board standoffs
Thumbscrew
Thumbscrew
Chapter 5. Removing and replacing components
265