Lenovo Computer ThinkCentre M900 10J0

Pre-replacement Safety Measures

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

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.

Disconnect the I/O box cable from the USB connectors on 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 three screws that secure the system fan.

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

Replacing the 2.5-inch storage drive

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

Locate the 2.5-inch storage drive

Is there a front Wi-Fi antenna installed?

Disconnect the front Wi-Fi antenna cable from the Wi-Fi card

Remove the screw securing the storage drive bracket

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 battery box cable from the USB connector on the computer

Remove the external battery box

Remove the screw securing the external battery box on the VESA mount bracket

Slide the external battery box to remove it from the VESA mount bracket

Remove the battery from the external battery box

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