I've tried uploading the firmware on my Marshall Code 25 using the Chrome, Opera and Edge latest browser versions on my Macbook pro 12.3 (Monterey) using a midi usb cable.
When doing the update the amp connects and allows me to click update... it shows the progress to 100% but then gives the error below:
"An error occurred. The update process was not completed. Please try restarting your computer/device, and then try the update process again."
I must have tried this a 100 times with no success.
Now when i resart my amp to play some tunes the display says "CHK USB" and the amp wont work.
This is all very frustrating and i hope someone can assist.
Please try the below to see if this helps ,
MIDI troubleshooting tips:
i also faced same issue, will try the trubleashooting tips. dickssportinggoods feedback www.lowes.com survey ?
Boujour, j'avais le même probleme. Je suis aussi sur mac et ça m'affiché le même message. j'ai essayé depuis un PC et ça à fonctionner. peut etre est ce une securité de apple ? Ou de norton ou autre ?
I'm also having trouble using a MacBook Pro too update the firmware. It said use Google Chrome so I downloaded that and now I get a screen saying about "can't connect too MIDI disconnect and try again"
I've used the boot loader too power up the code 25 with still the same conclusion.
This is so frustrating and anyone help me please?
Solution for CHK USB error: use Windows!
After a couple of hours of tries, either on Mac with Chrome or through Parallels with Edge/Windows 11, I could not make it work and my Code 25 was stuck with the CHK USB error. Luckily, I could borrow a Windows PC from a friend and that fixed the problem: I was able to repair the failed firmware upgrade. Good luck!