AT&T 6300 Service Manual page 117

INSTALLATIONS
13. Replace the lower System Module cover and tighten the two
cover screws.
14. Place the System Module back to its upright position.
15. Connect the cables that were disconnected (Keyboard,
Display, Printer, etc.) back to the rear panel of the System
Module.
16. Connect the system power cable to the System Module and
then to the ac wall outlet.
17. Verify that the Motherboard passes Power-Up Diagnostics
and then run the Customer Test Diagnostics in the
Automatic Mode. (Refer to Chapter 4.)
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