Panel is blank and flashing green light

[rotterman]

Possibly this?

Qolsys IQ Panel 4 Not Powering Up

Did you get a new Qolsys brand IQ Panel 4, plug it in but it won’t boot up? It could be that the battery is disconnected, very low, discharged, or entirely depleted. The IQ Panel 4 won’t boot up if the battery is disconnected or too low. New IQ Panel 4’s are often shipped with the internal backup battery disconnected. The panel will not boot up until the battery is connected. Check that the backup battery is connected Unplug the power supply from the wall to power down the panel. Don’t disc…