I can not get back the original firmware in devo12

I ask for help because I'm not getting back to the original firmware devo 12 (without telemetry) from my friend, when I try to go back to the firmware that is available on the website of walkera it is drizzled with the screen blank, just drizzle, if someone has passed the same problem or know how to ask to guide me.

Thank you.

You need to re-install the library file, too. Then it should clear up.

www.walkera.com/en/progoods.php?id=491&type=control

Upgrade Considerations:
Note:
1.It is a must to update both the program and library documents, othersise the radio or the icon won’t work well.
2.Amend the “signal lose” while using the telemetry function of this radio.
3.Optimized the power supply manage system,decrease uptime power lost.
4.Amend the beep alarm ,there are different tone or time space in different condition.
5,Amend the stop watch stepwidth to 10S,the MIN. setting is 10S,MAX setting is 60 mins.

EDIT: As it looks, Walkera only supports the Devo 12s (w/telemetry). I'd shoot them an email to make sure you still can get the original FW for it.

Btw, someone should move this post to General Discussions/Feedback & Questions since it's not really a Tutorial...

agradescer really want everyone, especially the vlad_vy that released the firmware as it worked here.

Thanks again and ask to have conditions to move the topic for general issues that can remove because I think it might be useful for others, otherwise it quizerem can also delete it so do not mess up the issues.

everything went right, what was happening is that the firmware that is on the site does not work for walkera 12 without telemetry, that Buddy vlad-vy posted worked just right for me, had changed firmware a few times and got to the start get more but this time the library was doing everything right.

Thanks again and everything is working nicely.