Silicon Graphics InfiniteStorage 4000 Series System Upgrade Manual page 80

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12. On the controller canister, press down on both of the top cover latch buttons, and
slide the top cover to the rear. Remove the top cover.
Figure 51 Host Interface Card Replacement
1. Top Cover Latch Buttons
2. HIC Thumbscrews
3. Host Interface Card
4. HIC Interface Connector
5. HIC Subplate
6. Zero Insertion Force (ZIF) Socket
7. Front Bezel