Not sure if it is related to this issue, but Kasli (CU3) decided not to communicate through ethernet. I have tried isolating the whole system to just a simple switch connected to my computer and Kasli, but nothing works. Here are some weird symptoms:
- The LEDs on the front panel for the SFP would light up when Kasli is powered initially, except for SFP2, and they start dimming in about 10 s.
- When we pulled Kasli out to take a look, we found that the indicator LEDs are not fully lit.
Upon first powering it up the board looks like this:
Note that the 1.2 V and 2.5 V LEDs are dim.
After about 10 s, the 1.2 V LED went out, and the 2.5 V LED got even dimmer (it does not go out):
The fan also does not turn on.
This looks like a power issue on the Kasli board. When we power cycle the whole thing with about a minute in between, the SFP front panel LEDs would come back on, except for SFP2, only to dim away in about 10 s. If we power cycle with only about 15 s in between, then the SFP front panel LEDs will stay dark.
What should we do with this? We are looking at the circuit diagram, and deciding our next steps. We do not wish to mess around with stuff unnecessarily, especially when we are not confident that our actions will solve the issue.
Do you want us to send this back for repair? Or is there a simple fix that we can employ?