Yes as above looks like a bus or device issue. Assuming you have checked and tested the cabling then just remove one device at a time. You could also split the busses as iirc the 96 has 2 busses
No it can't. Either run a cable to it or get a flashing led kit
I.e.
https://www.securitywarehouse.co.uk/catalog/bentley-double-flash-unit-with-two-leds-p-3742.html