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Cisco UCS C420 Server Installation and Service Guide
OL-27640-01
Chapter 3 Maintaining the Server
Status LEDs and Buttons
Status LEDs and Buttons
This section describes the location and meaning of LEDs and buttons and includes the following topics:
• Front-Panel LEDs, page 3-2
• Rear-Panel LEDs and Buttons, page 3-4
• Internal Diagnostic LEDs, page 3-7
Front-Panel LEDs
Figure 3-1 shows the front-panel LEDs. Table 3-1 on page 3-3 defines the front-panel LED states.
Figure 3-1 Front-Panel LEDs
1 Hard drive fault LED 6 Fan status LED
2 Hard drive activity LED 7 Temperature status LED
3 Power button and Power status LED 8 Power supply status LED
4 Identification button and LED 9 Network link activity LED
5 System status LED
334350
HDD 1
HDD 2
HDD 3
HDD 4
HDD 5
HDD 6
HDD 7
HDD 8
HDD 9
HDD 10
HDD 11
HDD 12
HDD 13
HDD 14
HDD 15
HDD 16
1 2
3
4
5
6
7
8
9