I managed to fix the Out2 error problem and I don’t think it has anything to do with overloading or calibration. Take out the battery. Then, take the 2 halves of the scale apart by undoing the 2 screws underneath the CE label on the back. Then you need to carefully clean around the 2 buttons - I used a very fine steel pick. A thick needle would probably work as well, just gently scrape around the buttons from both the outside face and as far underneath you can get on the inside face of each button. But the magic solution was a very slight spray of CRC where the buttons make contact. I probably sprayed a bit too much, but it worked immediately. Screw the 2 halves back together, insert the battery, job done. My Salter is around 8 years old and hopefully will go another 8. Good luck!