my alarm panal had no battery in it so i bourght a new one and switched it on the light behing the keypad came on but there is no sound coming through the key pad all fuses are in and ok. the fuse for the battery wasnt in so i put it in after. know nothing is working on the alarm no light to tell whats wrong with it. have i blown something. ther is only one senser on it and the rest is linked out. why is the keypad not working it was working before i put the battery in the fuses are ok not letting me do anying now tested all fuses all ok