Since you've had some work done on it, you might try disconnedting the batttery to clear the computer's memory so it can relearn its idle. It will take it a little while to relearn. Theoretically, if you disconnect the battery for 20 mins., that is enough to clear it. I like to leave it off overnight though...that way when I reconnect it at dark thirty the next morning, my alarm goes off and pisses off the neighbors.