Meru Technical Note - How to trouble shoot a faulty power supply
Description
Scope
Solution
When a controller or software appliance is showing an external health LED amber light, it means that there is a problem with the power to the unit, a sub system or a component.
How to trouble shoot a faulty power supply?
Scope
RELATED PRODUCTS: All Controllers, All SA
RELATED SOFTWARE VERSIONS: NA
KEYWORDS: Amber Light, Power Supply, Faulty Power Supply
Solution
When a controller or software appliance is showing an external health LED amber light, it means that there is a problem with the power to the unit, a sub system or a component.
NOTE: Some controllers may not have a redundancy power system and may have only one power supply.
To troubleshoot a system power failure, perform the following steps:
- Check if power supplies are connected.
- Check for Green LED on the power supply (Green light on, power supply good).
- Check for a continuous system beep. (if heard, no power to one of the power supplies or bad power supply)
- Swap power supply with known good power supply or swap power supply into the other slot.
Possible System Power Resolutions:
- If the power supply’s AC power cord is disconnected, connect it.
- If power supply is connected and no Green LED light is showing on the power supply, try connecting into another outlet.
- If the non-lit Green LED follows the power supply when swapping it into the other slot or a known good power supply works, change the bad power supply.
- If the Green LED stays on the power supply slot when swapping with a known good power supply, problem may not be with the power supply but with an internal sub system or a component.