Hi @Drc3p0,
This is an older V2, right? Do you happen to know which version of firmware is installed?
There was a bug in early V2 firmwares that could cause a reboot loop. v2.6 and v2.7 could enter a reboot loop when a sensor board was connected. I had sent out emails to any customers of both at the time (June 2018), but if your sensor board was a recent purchase and your PB version is old enough, you might have been bit by this issue and missed the email that I’d sent.
The work-around is to disconnect the SB or short TX to ground until you get the firmware updated. If that brings Pixelblaze back, then you definitely need the update.