Sun Microsystems Enterprise 250 Owner's Manual page 191

4 "Power Supply LEDs" on page 259
Note - The power supply retains its last power on/off state once it is removed from
the system. If you remove a power supply from a system that is powered off and
attempt a hot-plug installation into a system that is powered on, the power supply
will remain off. To activate the power supply, turn the front panel keyswitch from
the Power-On position to the Diagnostics position, and then back to the Power-On
position. Alternatively, you may press the Power-On key on a Sun Type-5 keyboard
attached to the system. For descriptions of the various keyswitch settings, see "About
the Status and Control Panel" on page 6.
How to Remove the LED/Keyswitch
Assembly
Before You Begin
Complete these tasks:
4 "How to Power Off the System" on page 55
4 "How to Remove the Side Access Panel" on page 60
4 "How to Avoid Electrostatic Discharge" on page 64
4 "How to Remove the Fan Tray Assembly" on page 150
Video Demonstration
Figure 8–7
Click on the icon above for a video demonstration.
Click here for Appendix E.
What to Do
1. Disconnect the LED/keyswitch assembly cables from the UltraSCSI backplane:
a. Disconnect the keyswitch cable from connector J0601.
This connector is located at the upper-left corner of the backplane (as viewed
from the rear).
Removing and Installing Miscellaneous Assemblies
157