IBM Power System 9040-MR9 Manual page 21

Figure 5. Placing the system in service position
11. Remove the service access cover.
Attention: Operating the system without the service access cover on for more than 10
minutes when the system power is turned on might damage the system components.
a. Push the release latches (A) in the direction shown in the following figure.
b. Slide the cover (B) off the system unit as shown in the following figure. When the front of the
service access cover has cleared the upper frame ledge, lift the cover up and off the system unit.
System backplane for the 9040-MR9 7