The only way to fix a bricked device is to perform the unbricking procedure. Cycle power and use ISPTool to flash in the first 5-10 seconds after power up. The backlight should be blinking with two quick blips, repeating every second or so in this bootup period. If you dont get the two blips during power on then we’ll need to get the device onto the bench for furher study.
Gnerally speaking you dont need to download firmware mannually, use the T3000 → help → check for updates → download firmware & update. This will make sure to load ONLY the correct firmware for your particular hardware. There’s two types of Tstat10 devices out there now, the orginal version based on the ST cpu and the latest version based on the ESP32. T3000 will check which version you have and load only the appropriate firmware.
You can learn more about the unbrick procedure here: