IBM B50 - Manual (Page 97)

6. Make a note of where the other cables and cords are connected to the back of
the server, then disconnect them.
7. Unscrew the two front thumbscrews that secure the server to the rack.
8. Gently slide the server out of the rack until you encounter the spring detents.
9. Release the spring detents by pressing in on each spring detent on both sides of
the server at the same time. While pressing in, continue to slowly slide the
server out of the rack until the spring detents are completely out of the rack.
10. Place the server on a flat surface.
11. Unscrew the three thumbscrews located at the rear of the server.
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Chapter 4. Installing and Removing Options 4-5