Issues with alarm Meta 357Tv2

[Arfa]

The alarm on my bike has started playing up. It no longer sounds. No beeping when armed or disarmed. And I can't get it to trigger when rocking the bike once armed (and after the initial 10 secs). However the indicator lights still flash as before when arming/disarming and the immobiliser still works.


Any ideas? Have I enabled one of it's obscure modes of operation or is there a genuine fault?