174 Upgrade and Maintenance Manual BX900 S2
Midplane
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Ê Reinstall the connection blades as described in section "Installing single-
width connection blades" on page 112 and "Installing double-width 
connection blades" on page 119.
Ê Reinstall the PSUs and fan modules in their old bays as described in 
"Installing a power supply unit" on page 94 and "Installing the fan module" 
on page 100.
Ê Reinstall the server blades and storage blades in their old slots as described 
in section "Removing / installing server blades and storage blades" on 
page 54.
Ê Reconnect the data cables to the connection blades.
Ê Reconnect the AC power cords to the PSUs and secure them with cable ties 
as described in section "Connecting the system unit to the mains" on 
page 50.
Ê Reinstall the server blades and storage blades in their old slots as described 
in section "Removing / installing server blades and storage blades" on 
page 54.
Ê If applicable, close the rack door as described in section "Closing the rack 
door" on page 60.
Ê Switch on the system unit as described in section "Switching on the system 
unit" on page 52.