If a firmware update fails or the device becomes unresponsive, it isn't always a hardware death sentence. Users have successfully "saved" bricked units using an ST-Link programmer to manually reflash the internal microcontroller.
Your PC does not see the device in programming mode. Force bootloader entry by: scanmatik 2 pro firmware
Some hardware failures (like "HW Failure" errors) are often mistaken for firmware bugs. In these cases, a firmware re-flash via an ST-Link programmer may be required to "save" the device. Power Sensitivity: Overview — Scanmatik 2 Pro firmware Scanmatik 2