Your PowerG Sensors aren't working after replacing your IQ Panel 2 Plus because they need to be synched with the system. Until the synching process is completed, you will notice a "Not Networked" trouble condition for your sensors. You can fix by tampering or power cycling the sensors. If your alarm monitoring company is helping you replace an existing Qolsys IQ Panel 2 Plus System with a new one, then a special process is followed. The programming information for the old system, including any PowerG programming, is stored on the Alarm.com servers, and that information is pushed down to the new alarm panel. Most of the settings are automatically applied to the new system, without requiring any further action from the end user. However, an extra step is needed to get the existing PowerG Sensors to work properly on the new system. The PowerG programming information from the old system is pushed down to the new Qolsys IQ Panel 2 Plus System, along with all other system information. The PowerG programming information tells the new system which sensors are being used and how their associated zones should be configured. But because PowerG Sensors are encrypted, the new system still must be "synched" with these PowerG Sensors. Until the synchronization process is completed, each PowerG Sensor will show a "Not Networked" trouble condition. You can synch each sensor individually to clear the trouble conditions. The PowerG Sensors will all work properly on the system after you do that. There are a few things to try when synching existing PowerG Sensors with a new Qolsys IQ Panel 2 Plus System. The first thing you should try is to tamper each "Not Networked" PowerG Sensor. Make sure the sensor is within wireless range of the system. Then open up the sensor to transmit a "tamper" signal to the system. Then close the sensor. You should find that the "Not Networked" trouble message clears. If it doesn't, you should then try to power cycle the sensor. Open up the sensor, and remove any batteries that are being used. This will power down the sensor. Wait a full minute (60 seconds) or longer with the sensor powered down. Then replace the batteries to power the sensor back on. Again, make sure that the sensor is within wireless range of the IQ2+ System. Close the sensor. The "Not Networked" trouble message should then clear for the zone. If you are still having trouble getting the "Not Networked" condition to go away, then you can try to reprogram the sensor as a last resort troubleshooting step. First, delete the sensor from the system. To do this, click the small grey bar at the top of the main screen, and choose Settings > Advanced Settings > Installer Code (default 1111) > Installation > Devices > Security Sensors > Delete Sensors, and then choose the associated zone, press the Delete button at the bottom, and confirm. Then open up the PowerG Sensor. Press and hold its enrollment button until three (3) red flashes occur, thereby indicating that the factory defaulting process for the sensor has been performed. Finally, follow this guide to enroll the PowerG Sensor with the IQ2+ System as a new sensor. Remember that the auto-enrollment mode for the IQ2+ is accessed by pressing the small grey bar at the top of the main system screen and choosing Settings > Advanced Settings > Installer Code (default 1111) > Installation > Devices > Security Sensors > Auto-Learn Sensor.