Alarms require service, systems are made of parts that need maintenance. Batteries that need replacing regularly, components that need testing for correct operation.
It's possible the transformer was blown by the controls or a surge has blown both, battery damaged the charging circuit and endless list of issues that could be wrong.
Either way it's simply not worth the effort of sourcing and replacing the transformer on such a basic panel.
If you were to try you would have to source second hand and hope for the best. Most likely engineers would skip a working one, so your unlikely to find one.