Lenovo ThinkCentre E51 Hardware Maintenance Manual - Page 98

Replacing a memory module 1. Remove the left-side cover. See "Removing the covers" on page 85. 2. Locate the memory connectors. See the system board illustration for your machine type at "Identifying parts on the system board" on page 86. 3. Open the retaining clips and remove the failing memory module. 4. Make sure the notch 1 on the new memory module is aligned correctly with the connector key 2 on the socket. Insert the memory module straight down into the connector until it snaps into position and the retaining clips are closed. 5. Go to "Completing the FRU replacement" on page 116. Replacing a PCI adapter 1. Remove the left-side cover. See "Removing the covers" on page 85. 2. Remove the screw securing the adapter being replaced. 3. Pull the adapter straight out of the PCI connector. 4. Remove the new adapter from its static-protective package. 5. Install the new adapter into the appropriate PCI connector. 92 Hardware Maintenance Manual