How to fix Betaflight Bootloader won't connect failed to open port

I ran into this problem recently and forgot how to fix it so I made a video to help out others.

[doublev]

5 years later you're still helping people. Thanks man !

[faheja]

Almost 7 years later, still helping people! Thanks!!! Messed around with this way to long, and your video saved me.

[jakewebber]

5 Years later and still a lifesaver. Thank you

[SQuiDFPV]

ah, my new pc worked fine on BF but i never had to replace firmware as they all been done so i thought it was working. until i had to re flash and couldnt. thanks for this vid. after hours of trying it was as simple as getting hte drivers like i did on my old pc. 3 years later your vid is still gold. excellent work

[JA-lbfo]

6 years later and still helping. Legend

[Crevtout]

4 years later you're still helping people. Thanks man ! :-P

[NickMelissas-owyx]

6 years later and you solved my problem. Thank you !!!

[matthewghazawy]

mate, 7 years on and you've just helped me after wasting hours trying to solve this

[davidjanvier]

My guy I couldn't connect my FC to betaflight I have been searching for an hour untill I stumbled onto your video you are a legend.

[MrQuint]

5 year after your video was out, you saved my life. You are a real one

[kalebjohnson]

Thank you so much for this video! The Zadig driver update was the part I needed.

[zincyellowmach]

You are my new favorite person!! It's been a couple years and i forgot how to do it but you saved the day!!

[alexinospeed]

5 years and and still is a best video ever!

[marianh]

You just made my day so much less frustrating. Huge thanks!

[CarloMario]

Thank you. Finally walking forward. God bless you

[Noah-qcsh]

Hey great video! Unfortunately this didn't fix my "Bootloader won't connect failed issue". I reinstalled all the drivers several times already. I could luckily solve it in another way (!):
1. Connect you drone as usual via USB
2. In the SETUP-Tab there's a button "Activate Bootloader / DFU". I clicked it, the drone will restart into Bootloader
3. Don't click "connet" this time
4. Click on the "Update Firmware Button"
5. Flash your desired Firmware, Done! (I could now erase / flash my firmware without issues) Once finished, I could connect to the drone again, new firmware was installed.


Hope this helps other ppl., but obviously you need to have the correct drivers running / working, before trying the 5 steps, as DumbThumbs explained really good!

[creed]

Thank you so much! I have spent almost a week trying to flash my drone! This was great! Thank you!

[Tenebray]

I have to admit... 6 Years later Im NEW to this hobby and thanks to YOU I could FALSH finally my new Speedybird F405 V4!!!

[littleshartboshart]

I've spent to much time trying to figure this problem out....two days into it lol, THANK YOU so much brother! problemo solved i owe you a beer hahaha!!

[josejrsalazar]

Been trying to figure this out for a week! So helpful thanks!!