Evening all. I can`t find anything similar to this problem on here so here goes. Our alarm system was fitted 4-5 years ago. Whilst DIY`ing new floor boards the upstairs cable that links to one PIR and the sounder outside has been cut. Using a connector block I`ve carefully stripped and connected all six cables back together however the sounder box has no light or power to it and the pir does not work. All three pirs downstairs still work but, for obvious reasons the alarm will now not set. I`ve double checked the connections at the cut and everything seems fine. I`ve put a volt metre on each of the six cables to see if I get ready with no response. Does this mean a fuse has gone in the main box? Any advice most appreciated.