I have a Jura Impressa F50 model. I have the indication Error 8. I can insert the tray and the dump box but then the machine makes a loud noise and finally indicates error 8. I can remove the tray and dump box without any problem . What can I do ? regards

This is the 2nd time in a month since I've had this machine that I had to call support for the same problem. An easy fix! I was instructed to remove the whole 'drawer assembly' and remove the grounds bucket. Insert the assembly without the bucket. Wait a minute, take it out again and replace the bucket. Then you're ready to go. Hope this helps.

Error 8 is a general error for not being in sync. There is a encoder disk that tracks where all the mechanical pieces are during the process. When they are not where they are supposed to be its an Error 8. This can be caused by a jamb, being dirty, faulty sensor... lots of stuff. Probably means your unit needs to be cleaned.
The quick way to fix this is pulling the cord out of the wall and wait a few seconds and plug it back it. This will cause everything to reset and usually clears the error... until you can clean it.
If you need help, parts guru has videos on youtube, parts and will rebuild you brew group for you. I have repaired mine 2x. Jura Capresso Home and Professional Espresso Machines