Lenovo ThinkCentre M90z Hardware Maintenance Manual for ThinkCentre M90z - Page 84

5. Open the retaining clips. If you are replacing an old memory module, open the retaining clips and remove the old memory module, as shown: Figure 12. Removing the memory module 6. Insert the notched end 2 of the new memory module into the slot 1 . Press the memory module firmly and pivot the memory module until it snaps into place. Make sure that the memory module is secured in the slot and does not move easily. Figure 13. Installing a memory module 7. Go to "Completing the parts replacement" on page 110. Replacing the battery Attention Do not open your computer or attempt any repair before reading and understanding the "Important safety information" in the ThinkCentre Safety and Warranty Guide that came with your computer. To obtain a copy of the ThinkCentre Safety and Warranty Guide, go to:http://www.lenovo.com/support This section provides instructions on how to replace the battery. Your computer has a special type of memory that maintains the date, time, and settings for built-in features, such as parallel-port assignments (configuration). A battery keeps the information active when you turn off the computer. 78 ThinkCentre Hardware Maintenance Manual