Matajen

I cleaned all the contacts and it works well now! Amazing, it was nothing wrong with the motors. Many thanks for your advice!

They seem all to be equally affected. Would be interesting to try a different box, even if it seems strange that the box could deteriorate upon storage. I have another model (Unimog) and see a bit of the same but not as bad. They are more or less the same age. I've let all motors run free for at least 30 min, but still doesn’t help. Will try electric contact spray on all contacts from the battery box.

I have an old Lego Technic set (8043) that has been standing and collecting dust for many years. When I tried to power it up it turns out that the motors have lost power. Of course I put in new high quality batteries. I also disassembled the model and rebuilt it but still doesn’t work. To be clear the remote and the motors work properly, but they have become so weak that they lack the power to make the model move. I have searched this forum and others to find an explanation and possibly a remedy, but so far with no success. Does anyone here has any advice to offer?