Tighten the screws in the following order:
All four power supplies – see Install a Power Supply.
Main module – see Install the Main Module.
Both processor modules or processor filler modules – see .Install a Processor Module or Processor Filler Module
Rear I/O module – see Install the Rear I/O Module.
All PCIe carriers or fillers – see Install a PCIe Card Carrier. Verify that you are installing the PCIe cards back in their original slots using the notes that you took when removing the cards from the slots earlier.
All five fan modules – see Install a Fan Module.
See Connect Power Cords.