support.dell.com Working Inside Your Computer 6-3
To close the computer covers, perform the following steps:
1. Check all cable connections, especially those that might have come loose during
your work. Fold cables out of the way so that they do not catch on the computer
cover.
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2. Check that no tools or parts (including screws) are left inside the computer.
3. Close the doors.
4. Set the keylock to the locked position before sliding the computer back into the
rack.
left top door
right top door
keylock