Severna Park's housing stock centers on 1978, which means a lot of garages here got their first opener somewhere in the late '70s or early '80s and their second one whenever that first unit finally gave out - often 15 to 20 years later. If your opener is grinding, reversing halfway up, or running the motor without moving the door at all, you're probably looking at either the original-era chain drive wearing its gear out, or a second-generation unit from the '90s or 2000s hitting the same wall. Some houses on this build cycle have already gone through two openers and are due for whatever comes next - a logic board that won't hold a program, a sprocket stripped down to nothing, a sensor pair that's drifted out of alignment after years of the garage door slamming the frame. The symptom rarely tells you which generation of hardware you're dealing with until someone's looking at the unit directly.