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# Cannot Flash a Firmware

## List of Symptoms:

### Thonny shows error while flashing firmware (or Micropython) using Windows
Possible causes:
  - Windows is blocking access to Espressif Serial device

### On Linux, the DevBoard device shows briefly and then disappears; the command ls /dev shows no DevBoard device
Possible causes:
  - USB-C resiptacle wasn't soldered properly; some pins have poor connection
  - ESP32-S3 Module wasn't soldered properly; some pins have poor connection

### Device manager alternates visibility of DevBoard device from connected to disconnected
Possible causes:
  - Strapping pins pull-up resistors or capacitors are incorrect

### Issues during uploading the firmware
Possible causes:
  - ESP32-S3 Module was not properly soldered; some pads have poor connection. Consider re-flowing/re-soldering
  - USB-C reciptacle was not properly soldered; some pads have poor connection. Consider re-flowing/re-soldering
