The most likely part ot need replacing on the iKegger 2.0 system is the gauge of the regulator.
If you forget to turn the regulator off when installing or removing a source of gas (including disconnecting or connecting a pressurised keg) then you can damage the gauge and the needle will be stuck on a pressure above zero.
This should be avoided as it can damage the internal mechanism, however in most cases can be fixed by replacing the gauge.