how can i fix accenta g3 mini after pir move?

hi i have aaccenta g3 mini system, its about 7 years old. i have had no problems with it untill today. i moved one of the sensors, and the alarm went into tamper mode . i managed to silence it by the usual method ie code ,reset etc. however now none of my sensors are working ie red lights do not come on and the alarm will not set. any idea's please.