We were asked to open this digital safe at a residence in Liverpool as the keypad stopped responding and the over-ride keys could not be found. We were told that the batteries had been changed recently so we suspected that the cover may not have been fitted correctly and they had fallen out. We picked the lock open to discover that the batteries had been inserted the wrong way around.
A useful tip when changing any sort of combination or batteries on a safe is to check the operation at least three times with the door open. If something does go wrong then it is always easier to resolve the issue with the door open.
We completed this job by changing the lock and providing two new keys so that the owner can get into the safe should the batteries fail in the future.