Hello,
I'm quite new on this forum
I have a MF3010 with very strange behavior : i explain the issue :
I swith on the printer, the "1" is displayed for one to two seconds and then the panel displays circle like if the printer was busy
And nothing else, i could wait hours it would have been the same...

Test Print Function is OK :
1) Set A4/LTR papers on the pickup tray.
2) Continuously open and close the Delivery Tray [1] at least 5 times for odd number of times
with the Power Switch ON.
3) A 1-sided engine test print is executed.
Paper is taken and horizontal line are printed

I changed the toner which was original by another one (original too) same issue.

I noticed that the scanner doesn't do anything (noise or light), i don't know if it could be related.

A short video of the issue
https://youtu.be/mp4e2rKsh_I

Any advice or help will be appreciated, i have the Service Manual but despite i read the 133 pages, i didn't find any clue...

Kind Regards.

Gerald