Installing the Power Supply Modules
After you have removed all the screws that secure the existing power
supply module to the lower bay, carefully move the module to the upper
power supply bay.
When in place, secure the first power supply with screws.
Get the second redundant power supply ready.
Firmly hold the power supply and align it to the lower bay.
When in place, secure the second power supply with screws.
Reinstall the right door but do not close it completely.