Press the power button again to turn on your Mac. Press and hold the power button for 10 seconds. Click the Apple menu in the top left corner of your screen. This won't cause you to lose any data or files it's just a way to reboot your Mac that's a little more useful than just restarting it. Below are some steps to address the various potential problems affecting your USB connectivity.įirst things first, try doing a "soft reset" of your MacBook. Sometimes it can be attributed to a physical issue with the port being loose or other times it could be an electronic component failure. Lastly, the least likely but certainly possible cause of USB connectivity issues is a failing or failed port. Other additional common issue causing the USB ports to stop working are corruption of the PRAM/NvRAM or in some cases incorrectly set system permissions. Another reason the USB port can stop working is If an attached device pulls too much current through the USB port, the the SMC (System Management Controller) can shut the port down and limits it's functionality. Make sure you unplug all devices other that mouse and keyboard before starting. Some of the potential problems include driver issues, or sometimes conflicting USB devices can interfere with other connected USB devices so always remove all potential sources of problems and start with the bare minimum. I tried installing everything on a second computer and couldn't get a connection on that one either.There are several possible reasons your USB ports might be acting up, not recognizing attached devices or not working consistently. 
Using Zadig, when I List All Devices, nothing shows up related to the flight controller. I don't see any objects under USB controllers that look like they have anything to do with the flight controller and when I plug it in or unplug it, none of the listed USB devices change state. COM3 doesn't show up in BetaFlight and the icon in Device Manager is greyed (not connected). When I look in device manager, under Ports (COM & LPT), I see "Silicon Labs CP210x USB to UART Bridge (COM3)). Using a FlySky FS-I6 radio with a FS-IA6B receiver currently plugged in PPM It doesn't show up in BetaFlight and I get the "Failed to open serial port" messageĭownloaded and installed the CP210x and STM USB VCP drivers. When I plug in the USB plug, the red led flashes a few times and the blue led stays constant on. I also just bought a Wizard x220 from Banggood.
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