3Com 3500 appendix Power-up Diagnostics, LED Name, Color, Description, PSI or PS2

Quick Installation Guide 7

Power-up Diagnostics

The system runs diagnostic software at power up. This software verifies that every component in the system is operating correctly.

If any component fails during power-up diagnostics, the system either fails to power up or the faulty module comes up but all of its ports are out of service. When the system comes up, verify which modules, if any, have failed diagnostics by checking the module LEDs against the tables in the module installation guides or by viewing the system configuration display in the Administration Console (if you have connected the system to a workstation) or in the System Summary form on the WebConsole.

During power up, the system processor LEDs provide information on components in your system, as shown in Table 4.

Table 4 System Diagnostics — System Processor LED Activity

LED Name	Color	Description
PWR	Steady green	System is receiving power.
RUN	Steady green	System is running diagnostics.
	Blinking green	System is operational.
PSI or PS2	Steady yellow	Additional power supply, if installed, is not
		plugged in or is out of specification.
SYS	Steady yellow	System processor has failed.
	Blinking yellow	A hardware/software mismatch has occurred.