I have three Cisco 2960G switches that I pulled from a working environment. All three of them are experiencing the same problem, so I have a hard time believing they have all simply failed.
Here's the problem:
When I plug in the power, all the ports lights flash once and the SYST, RPS, STAT, DUPLX and SPEED lights come on for a second. Then all the lights turn off, except for the SYST light which stays green. Nothing ever appears on the serial console. Holding the Mode button while applying power does nothing.
Do I really have 3 switches that all died at the same time?
Best Answer
Open a TAC case as these may be affected by this Field Notice.
This revolves around a known memory issue by parts from a particular supplier that have a high failure rate. These parts have been included in many different platforms including many models of the 2960 line. You can find the main page discussing this issue and providing a number of field notices here.
In particular, the failure can occur during normal operation, but won't interrupt service. It is only after the devices have been power cycled that they fail to boot.
Specifically to your issue, would be this excerpt: