Lenovo Computer ThinkCentre M900 10FM

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.

Disconnect the internal speaker cable from the internal speaker connector on the system board.

Release the two tabs securing the internal speaker and lift it out of the holder.

Pre-replacement Safety Measures

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 that are connected to the computer.

Disconnect the external battery box cable from the USB connector on the computer.

Remove the screw that secures the external battery box on the VESA mount bracket.

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

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.

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 storage drive bracket

Locate the memory module to replace

Open the retaining clips and gently pull the memory module out of the memory slot

Insert the notched end of the new memory module into the slot and press firmly until it snaps into place

Ensure the memory module is secured in the slot and does not move easily

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