Good day. I apologize in advance for my level of English, I am from Russia. I am using an HP 1810-48G J9660A Switch. Power outage occurred during the firmware update process. Now, after startup and initialization, all ports of the switch are inactive, none of the ports are working, resetting to factory settings did not help. How can I restore the firmware of the switch? There is no external console port, but there is a connector labeled COM on the switch board. I understand that through this port I can restore the device, but I need instructions on how to proceed. An RS-232 cable is available, but I do not know how to establish a connection with the device.
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