The Nimble Setup manager must be installed on your windows machines. The array is using a UDP broadcast to announce itself to the install software (no IP assignment needed) on the same subnet.
Things of note:
You must be running the same level of install software to OS. So 1.X software for 1.4 code, and 2.X software for 2.X code.
I have seen switches auto-disable the eth1 ports as they see the UDP broadcast as a port storm.
Make sure the both nimble controllers are running - press the power button once (quick push tell the passive controller to boot)
As a last resort:
Run the serial console software with the following settings:
Data bits: 8
Stop bits: 1
Log in as user admin with the password admin.
Attach to the serial port on the A ctrl - and run "setup" form the commend line. If the password doesn't work, then the B ctrl is active. Move cable to b ctrl and try "setup" from there.
As always you can call support and they will help you immediately.
Setup can be run interactive or as a single command line.
Here's an example of just doing the setup from a single command line:
$ setup --name nimbleclisetup --domainname admin.nimblestorage.com --dnsserver 188.8.131.52 --ntpserver time.nimblestorage.com --timezone America/Los_Angeles --subnet 10.12.147.253/255.255.0.0 --subnet_type management,data --subnet 10.12.155.253/16 --subnet_type management,data --subnet
10.12.0.0/255.255.0.0 --subnet_type management,data --subnet 10.12.0.0/16 --subnet_type management,data --array_ipaddr 10.12.147.253 --discovery_ipaddr 10.12.145.253 --data_ipaddr 10.12.153.253 --data_ipaddr 10.12.155.253 --data_ipaddr 10.12.157.253 --data_ipaddr 10.12.159.253 --support_ipaddr 10.12.149.253 --support_ipaddr 10.12.151.253 --default_gateway 10.12.255.254