Update Controller-ESP32-WROOM.md

Author: jw098

Wiki/SetupGuide/Controllers/Controller-ESP32-WROOM.md

@@ -256,7 +256,7 @@ If you are unable to connect to the ESP32 in step 4, it means the ESP32 either i
 Try the following:
  - Ensure you have reset the device. Try disconnecting the cable to the ESP32-S3 device, then reconnect it.
  - Try different USB cables and different USB ports. Sometimes it will not flash properly over certain USB ports.
- - If this still fails, review [step 2](#step-2-flash-the-firmware-to-the-esp32) above (Flash the firmware to the ESP32) and ensure that you flashed the firmware properly onto the device.
+ - If this still fails, review [step 2](#step-2-flash-the-firmware-to-the-esp32) above (Flash the firmware to the ESP32) and ensure that you flashed the firmware properly onto the device. When flashing, ensure that the top left checkbox is checked. The top row should be green.
 
 ### ESP32 fails to connect to Switch.