I have a DSC PC1000RK alarm system, the electricity went off in my house the other day, after the electricity came back on the alarm sounded, then went off. But now the alarm won't arm itself whent the code is entered. I opened the control box, the battery has one post that is corroded away. Should the alarm still work without the battery if the electricity is on? The "ready" light is on & the appropriate "zone" light comes on when the door is opened.
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