I had an interesting issue while powering up my expander unit.

Condition: In my home, with no inputs or output XLRs connected. No connections on main mix desk either. Just AC power to each item and the factory supplied ethernet cable between them. Both power cables plugged into one power strip and in turn the strip plugged into a grounded outlet.

I have used these pieces together successfully maybe 25 times without issues.

Board booted normally. I found the 2412 without any internal or external LEDs lit. I checked the fuse. It was open with evidence of overheating causing melting in the middle of the fuseable link in the glass. The fuse was not violently blown and dark in the glass like it experienced a huge over-current event.

I had an exact replacement fuse. After replacing the fuse, unit started and ran normally without problems. It has restarted multiple times without incident. No further fuses have blown.

I must admit to being a bit apprehensive though.

Thank you,
John