If the software loader cannot detect the interface over a standard USB connection, the bootloader on the chip is completely broken. Direct hardware flashing is required to wake the chip back up. Requirements for the Repair
(often provided by the original seller) to re-flash the STM32 or Atmega chip with compatible 22.3.1 firmware. VCIConfig Utility : In some cases, manually launching VCIConfig.exe
: Program a unique or universally accepted un-blacklisted serial string provided in your repair package.
What color are the displaying when plugged in?