Solving Hardware Problems - 3Com SUPERSTACK 3 3870 Series Getting Started Manual

Solving Hardware
Problems
An internal fan has malfunctioned. If a fan has stopped spinning,
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power off the unit and check the air vents for obstructions. If this
situation occurs, the Fault LED will light red.
The internal PSU has failed and power is being supplied by an external
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Redundant Power Supply (RPS). Although the Switch has a fault it will
continue to operate normally.
On Powering up, the Power/Self Test LED lights yellow for about ten
seconds after which it starts flashing green. This is normal and does not
indicate any of the above conditions.
A Port Status LED is flashing green/yellow
The port has failed and has been automatically disabled. The Switch
passes its Power On Self Test and continues to operate normally, even if
one or more ports are disabled.
A link is connected and yet the Port Status LED for the port does
not light
Check that:
The Switch and the device at the other end of the link (or cable) are
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connected securely.
The devices at both ends of the link are powered-up
■
The quality of cable is satisfactory
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Auto-negotiation settings are the same at both ends.
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Auto-negotiation problems will occur with 10BASE-T, 100BASE-TX or
1000BASE-T where auto-negotiation is disabled and incorrect cables
are being used (cross-over or straight).
In the rare event of your Switch unit experiencing a hardware failure,
refer to the list of suggested solutions below.
An expansion module is installed and the unit will not power up
Ensure that the expansion module is fully seated in the slot and the
connectors are engaged so that the securing screws can be tightened.

Solving Hardware Problems

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