Removing the top cover
Note: Before you install optional hardware devices, make sure that the server is
working correctly. Start the server, and make sure that the operating system starts,
if an operating system is installed, or that a 19990305 error code is displayed,
indicating that an operating system was not found but the server is otherwise
working correctly. If the server is not working correctly, see the Problem
Determination and Service Guide on the IBM Documentation CD for information about
how to run diagnostics.
To remove the top cover, complete the following steps:
1. Read “Safety” on page v and “Working inside the server with the power on”
on page 40.
2. If you are installing or replacing a non-hot-swap component, turn off the server
and all attached peripheral devices. Disconnect all power cords; then,
disconnect all external signal cables from the server.
3. Slide the server out of the rack until the slide rails lock into place.
Top cover
Cover release
latch
4. Lift the cover-release latch. The cover slides to the rear approximately 13 mm
(0.5 inch). Lift the cover off the server.
Attention: For proper cooling and airflow, replace the top cover before you
turn on the server. Operating the server for more than 2 minutes with the top
cover removed might damage server components.
Removing the top-cover bracket
To remove the top-cover bracket, complete the following steps:
1. Read “Safety” on page v and “Working inside the server with the power on”
on page 40.
2. If you are installing or replacing a non-hot-swap component, turn off the server
and all peripheral devices, and disconnect the power cords and all external
cables.
3. Slide the server out of the rack until the slide rails lock into place.
4. Remove the top cover (see “Removing the top cover”).
44 IBM System x3850 X5 and x3950 X5 Types 7145, 7146, 7143, and 7191: Installation and User's Guide
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