IBM Power System 9040-MR9 Manual page 19

d) If applicable, open the rack door at the rear of the system.
e) Label and disconnect the power cords from the system unit as shown in the following figure.
Notes:
• This system might be equipped with two or more power supplies. If the removing and replacing
procedures require the system power to be turned off, ensure that all power sources to the
system are disconnected.
• The power cord (B) is fastened to the system with a hook-and-loop fastener (A). If you are
placing the system in a service position after you disconnect the power cords, ensure that you
unstrap the fastener.
Figure 3. Removing the power cords
(L003)
or
Disk drives or solid-state drives for the 9040-MR9 system 5