LG G2 - can fixing cracked screen damage GPS

Screen cracked and was repaired at a local shop. approx 2 weeks later, I tried using Waze and Google Maps with no luck. Im getting an error - NO GPS showing approximate location. after going back to store, they said there is no way that the work they did could cause the issue. Im sure the apps worked - I used them to get to the store...Any assistance would be greatly appreciated, I tried using AGPS etc with no luck. Things are alittle tough now and a new phone is not an option - I need the GPS for work. Thanks