how can i fix my gemini alarm model 2343?

my alarm stopt working totaly then starten workin again off its own back 5 days later then it has done it again and doesent work at all now iv got power in to each module dont no how to check for power out got any idears wot it could be let me no coz some inconsideret person thort i would b a good i dear to try and brake in last night any anwsers would b appreacheated thanks the alarm moddle is a gemini 2343 thanks all