Battery contacts on Classics

[rprosperi]

(04-08-2017 04:05 AM)olr Wrote:  When the machine is powered by battery, the left and right pin for the wall plug (the two lower ones in your picture) must be shorted. Maybe the responsible "spring" fails to make contact.

Agree, this is often the problem. Once you are sure the left and right pins in the charger socket both make contact with the metal plate, try cleaning the area where the pins contact the plate with DeOxit (or a similar) contact cleaner.

Edit: Looking again at your photo, there is indeed evidence of oxidation (greenish spots) on the metal plate that connects the left and right pins when the adapter is not installed, so this likely is the issue.

If this does not work, I'd say Tony is right there must be damage inside, which is odd as those battery contacts look as clean as new. While the contact cleaner is handy, also clean the battery contacts (both the contacts in the machine and also on the battery), oxidation is still possible even though they photograph well.