Very much the same story with one of our cash loaders.
It went down before the holidays then we upgraded to TransACT from OnRecord because we had upgraded the SIMS server.
After they had spent the whole of the holidays replacing various parts and upgrading the software we are now back with the original fault because they never replaced the faulty finger print reader in the first place.
Fortunately it has been my compatriot who has been dealing with them as I think I would have killed someone.