GPS not working

Hi,
i have a problem with GPS functionality of my PadFone Infinity A86 after changing the mainboard?
The problem was that my phone was not able to charging, and i send it to asus and now i have it back since one week.
All works fine, i have a new update from 4.2.2 to 5.0.2 Android, but the connection to GPS still not working?
Even if i use Google Maps or HERE Navigation, still the same problem, is there any help for this, i need the navi function?
The message 'Waiting for GPS' still for long time but nothing happens, any idea whats going wrong??

The Motherboard is new changed.
G-Sensor Test is failed, Error 1907.

Sorry for doppelpost, i didn know that the threads are automatic closed after 30 days.

Thanks for any help
mirso

I had the same problem and allmost send in my padfone for repairs but did a downgrade to kitkat instead and now no more GPS problems. Seems a software issue with lollipop and not a hardware issue.