PB just stopped working

Have been running my custom display 12X27 matrix tube for over one month with no issues. Then last week the display froze. I shut it all down the powered it all back up. PB LED 1 long then 3 quick (setup mode) every time now, however, it’s impossible to get my PC or iPhone to see it therefore cannot access the PB anymore. Power is regulated at 5v, 5.0amps. Any ideas as to what’s going on here? What can I possibly do to get back up and running? This is slightly stressing me out.
Thanks in advance.

I was stressed out and not thinking very clearly. I found the issue: a loose screw was touching a wire and causing the PixelBlaze to not function correctly. My bad. I love this thing.