Calling all experts with remarkable memories,

  

I have a question that requires your expertise and recollection. In my possession, I have seven GL300A controllers, all of which were operational when I updated their firmware through the app. However, I encountered a problem when attempting to repeat the process, leading me to store them away in my garage and forget about them until now.

  

After reading some discussions, I came across a suggestion stating that the GL300A firmware could be updated without using the app. Instead, a USB stick can be used with the firmware file named P3X_FW_V01.03.0020.BIN. Tracking down this firmware version proved to be a challenge as DJI no longer provides access to older releases.

  

However, when I insert the USB stick with the firmware into the controllers, nothing seems to occur. Even upon inspecting the USB stick, there is no .txt file indicating a pass or fail outcome.

  

It's hard for me to imagine that all seven controllers would malfunction simultaneously. Thus, I find myself puzzled and questioning what I might be doing incorrectly.

  

Could it be that I'm utilizing the wrong firmware? Does the specific filename matter as long as it ends with .BIN? I would greatly appreciate any other suggestions or insights because, honestly, I feel completely lost.

  

I eagerly anticipate your valuable assistance and guidance. Many thanks in advance for your expertise.

Hi, flymle. Thank you for reaching out. We have sent you a PM, please check. Thank you.

Hi Gamora,
I appreciate your assistance, but regrettably, the solution you provided did not resolve the issue. The problem persists, as all controllers continue to disregard any USB input. Do you have any further suggestions?

To provide more context:
1.        None of the controllers respond to the update xxx.bin.
2.        The DJI Go app fails to establish a connection with any of the controllers.
3.        All controllers successfully connect to the drone by utilizing the Vulcan nerve pinch method (C1+C2+record+right side wheel press, along with the unmarked button next to it) to initiate the search for the drone.
4.        Once connected, the beeping ceases.
5.        The power light exhibits a rapid red/green flashing pattern.

Although it seems logical that issues 1 and 2 might indicate a problem with the video control board, it seems improbable that all controllers would be affected simultaneously. I am curious to know if the video board from a GL330B or GL300C could potentially revive a GL300A if installed.

Thank you for your continued support.

flymle Posted at 7-7 04:55
Hi Gamora,
I appreciate your assistance, but regrettably, the solution you provided did not resolve the issue. The problem persists, as all controllers continue to disregard any USB input. Do you have any further suggestions?

Hi, flymle. Thank you for the reply and update. Let me forward this to our relevant team for further checking. I'll let you know once we receive an update.