Lenovo Computer ThinkCentre M900 10NE

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 connected to the computer.

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

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.

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

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

Remove any media from the drives

Turn off all connected devices and the computer

Disconnect all power cords from electrical outlets

Disconnect all cables connected to the computer

Disconnect the system fan cable from the system fan connector on the system board

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

Refer to the 'Lithium coin-cell battery notice' in the Safety and Warranty Guide

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

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 the internal speaker out of the holder.