Need to downgrade firmware

[Dutch_Mike]

By accident 1 employee of the company has upgraded the printer to the latest firmware of juli 1 2021, now because of that, it doesn't accept our toners anymore, and the printer does'nt want to print. So i am in desperate need to revert back to the older firmware that doesnt have this restriction anymore. 

Regards,

Mike

[Valsimot]

The firmware downgrade is not recommended you can make your device inoperable.

I have uploaded an older version of firmware from 2020. for testing purposes, if you want to downgrade:

https://drive.google.com/file/d/1N_z35NZzp8uAeHUMo87Vg3Jtdl4_NZPU/view?usp=sharing 

[Dutch_Mike]

Thanks for your response.

i tried to apply the older firmware but it doesnt let me. i opened the exe file as admin. it ran, and showed me the printer that it is about, but where i need to check the box to select the printer, i cant... and it says not applicable.

so what to do next ?

thanks in advance.

[Valsimot · Accepted solution]

Use 7zip to extract .exe file, locate the actual firmware file, it has an extension .full

Save full. file on an empty USB drive, insert a USB on the front USB near the control panel wait for a minute then go to the USB on the front panel and check is there firmware to run.

[Dutch_Mike]

That worked like a charm.  i did plugged the USB stick in the printer, and when i woke up the printer it asked,  i see a firmware upgrade. do you want to upgrade ?  i pressed yes and the rest went on its own. it rebooted and when it came back it looked as before. I went into "info" to see if it had  the old firmware version back. It had. My printer cartridges were accepted again. 

Thanks for the support. Keep on going.

Regards,

Mike