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You can google this search phrase and find the installation manual, owners manual, and a lot of blogs on troubleshooting it - NetworX NX-8V2 alarm manual


Common rule of thumb with alarm system problems - disconnect all sensors and get the panel powered up correctly and backup battery charged and unit accepting programming first - then start adding sensors - one at a time at first to see if you have the connection and programming right. If so, then you can either keep going one at a time or try adding several at a time. Definitely helps to have someone to help with triggering the sensors to test them, and a volt-ohm meter is nice to be able to tell if working right at the alarm box end of the system. And of course, leave the siren or horn off till last - some models you can disarm it and all you see is a little alarm light, others you have to actually unwire it to keep it from sounding during your tests.


Of course, with ones connected to a central alarm station, disconnect the phone line or cell phone connection first before messing with it (and call alarm station first to tell them you are doing so if currently connected) so you don't generate a bunch of false alarms.


On the doorbell - two likely possibilities, which may relate to the smoke detectors too: Doorbell normally runs off a 12, 16.5, or 24V transformer (commonly hidden under entry inside landing or stairs) and some companies wire alarm systems to that - so it may be your power issue is that the transformer circuit is dead, or transformer is burned out. Installation manual says yours runs off 16.5V transformer, so may well be that is your issue. Commonly that type transformer is an exposed type - either just nailed to the studs (illegal) or mounted in an electric box - commonly look like this -

http://www.be-electronics.com/v/vspfi...


Or may be just a regular plug-in type transformer like are used for laptops, cell phones, etc - look for a small gauge wire leading into the power board, may feed to the controller first or to an emergency backup battery squirrelled away somewhere.


Second possibility on doorbell is that it is wired through the alarm box, so when doorbell rings it chimes on the alarm monitoring boxes - both the one by front door (and maybe back door) but maybe also in master bedroom and possibly even outside on patio or pool deck. These are commonly set up to ring doorbell and have two-way speaker capability as well.


One other hint - many of these systems feed their power through a backup battery (looks like a motorcycle battery commonly) and maybe voltage regulator, so if the battery is missing or totally defunct or disconnected the unit will not get power either.


My experience - electricians are generally not much use on alarm systems - better bet would be another alarm company familiar with the system, or at worst an instrumentation tech - the commercial ones that work on building alarm and environmental monitoring and such systems. Honeywell or Siemens Home Systems for example.