Lenovo Computer ThinkCentre M900 10FS

Read and understand the 'Read this first: Important safety information' on page iii

Remove all media from the drives and turn off all attached devices and the computer

Disconnect all power cords from electrical outlets and disconnect all cables connected to the computer

Disconnect the external optical drive adapter from the USB connectors on the external optical drive and the computer

Remove the external optical drive box

Remove the screw securing the external optical drive box on the VESA mount bracket

Slide the external optical drive box to remove it from the VESA mount bracket

Remove the external optical drive

Pre-replacement Safety Measures

Read and understand the 'Read this first: Important safety information' on page iii.

Ensure a 90-watt power adapter is available for M700 and M900 models.

Remove all media from the drives.

Turn off all attached devices and the computer.

Disconnect all power cords from electrical outlets.

Disconnect all cables connected to the computer.

Read and understand the 'Read this first: Important safety information' on page iii.

Remove any media from the drives and turn off all connected devices and the computer.

Disconnect all power cords from electrical outlets and disconnect all cables connected to the computer.

Remove the computer cover. See 'Removing the computer cover' on page 77.

Locate the system fan. See 'Computer components' on page 5.

Disconnect the system fan cable from the system fan connector on the system board. See 'Parts on the system board' on page 6.

Remove the screws securing the system fan

Read and understand the 'Read this first: Important safety information' on page iii

Remove any media from the drives and turn off all connected devices and the computer

Disconnect all power cords from electrical outlets and disconnect all cables that are connected to the computer

Remove the storage drive bracket

Disconnect the Wi-Fi antenna cables from the Wi-Fi card

Remove the screw that secures the Wi-Fi card

Pull the Wi-Fi card out of the M.2 Wi-Fi card slot

Pre-replacement Safety Measures

Read and understand the 'Read this first: Important safety information' on page iii.

Remove any media from the drives and turn off all connected devices and the computer.

Disconnect all power cords from electrical outlets and disconnect all cables connected to the computer.

Replacing the 2.5-inch Storage Drive

Remove the computer cover. See 'Removing the computer cover' on page 77.

Locate the 2.5-inch storage drive. See 'Computer components' on page 5.

Is there a front Wi-Fi antenna installed?

Disconnect the front Wi-Fi antenna cable from the Wi-Fi card if applicable.