Before changing the battery on the DSC832 (PC5010), the keypads and motion sensors were all lit. They went dark as soon as the old--and very weak--battery was disconnected. After the new fully charged battery was connected, no power returned to the system--the keypads and motion sensors remain dark. How should this be troubleshot? Unfortunately, the main current breaker switch was not turned off before the old battery was removed; but neither was it tripped afterwards and the transformer is still getting power.