Updated to Firmware 6.5.3 (MK4S with MMU3) - MMU3 not working anymore  

Updated to Firmware 6.5.3 (MK4S with MMU3) - MMU3 not working anymore

Hello guys,

I have installed the firmware:

• MK4_MK4S_MK3.9_MK3.9S_firmware_6.5.3.bbf
• with the MMU3_FW3.0.4+936.hex

(Downloaded in the offical PRISMA Firmware and Download section)

My Printer is an MK4S with MMU3, but after this Firmware update, my printer says, that the MMU3 is not compatible with the Firmware 6.5.3I did a hard firmware reset, problem still occures.

After that, I have installed the Firmware:

• MK4_MK4S_MK3.9_MK3.9S_firmware_6.4.0.bbf
• MMU3_FW3.0.3+896.hex

This works for me.

But, next day, it says: to much power onthe MMU 🙁
I did a hard reset again, with the 6.4.0.bbf and 896.hex - and works again.. maybe for more than one day.

I also checked all cables, but all seems fine.

Is there an older firmware version, I could download and use for my MK4S with MMU3?Just got lost in the GitHub Repo.

Thank you in advance!

Best regards,
David