IBM System x3550 M4 Installation And Service Manual page 324

4. Reinstall the video connector assembly screws.
Figure 208. Video connector assembly screws installation
5. Reconnect the front video cable to the front video connector on the system
board.
Figure 209. Front USB and video cables connection
6. Install the cover (see "Replacing the cover" on page 209).
7. Reconnect the power cords and any cables that you removed.
8. Slide the server into the rack.
9. Turn on the peripheral devices and the server.
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IBM System x3550 M4 Type 7914: Installation and Service Guide