Assuming that zone on the back is programmable it might work , you also have an onboard relay which could be used for a bell trigger depends on what it does
Common problem on these are the spring , users mess around with the cover and screw and realise it was the spring after all
Not surprised by what you're saying you didn't need to do half of what you did but it is how it is, you damage the case
Be gentle adjust spring and your done, or call an engineer... ...