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I heard of connecting an old modem to a serial port for this purpose. If it doesn't respond to any AT commands then power may be out.
by tenebrisalietum 4y ago
I heard of connecting an old modem to a serial port for this purpose. If it doesn't respond to any AT commands then power may be out.
- Nextgrid 4y agoAny networked device will do - switch, router, etc. If there's no link on the port, power is down. USB-C Ethernet adapters with power pass-through will generally power the Ethernet module off the USB-C power port even if no host device is plugged in. USB-to-Ethernet adapters may also light up the port even if only connected to power (and not a host device).