@Ethan-TP Unfortunately switch appears to be completely unresponsive. I can't ping it, connect to CLI via SSH, or via RJ45 RS232, or mini USB console. I went ahead and opened RMI request...

@Dr_Marty No - so far I can't get to the console. I have tried methods described on https://www.tp-link.com/us/support/faq/3146/ and https://www.tp-link.com/us/support/faq/3177/ from windows and mac...

Correction about hardware/firmware: Model: SG3210X-M2 v1.0 Firmware Version: 1.0.11 Build 20250428 Rel.61524

After working flawlessly almost a year SG3210X-M2 switch went offline. Power and 2.5G ports status green, but no activity. Sys led not flashing. Reboot or reset does not help. Bought from Provantage...