Step 2.  Remove the following components as illustrated: 
•  Ten screws (PH 2 screwdriver)
Figure 272. Disassembling the system board
Step 3.  Remove the following components as illustrated: 
•  Four screws (PH 2 screwdriver)
Step 4.  Separate the system board from the supporting sheet metal. 
Figure 273. Disassembling the system board
364 ThinkSystem SR670 V2 Maintenance Manual