GPS OK disassembled. GPS fail assembled.

Hi.

I have a iPhone 5 where the GPS almost disappear when I re-assemble the device. The GPS time is updated only approx. every 12 seconds.

If i lift the screen just a bit, the GPS signal is OK again. Then the time update every second like i should.

What am i missing here? Some ground touching where i shouldt? I checked the interconnect cables, and they are both connected as they should.

It is a 3rd party screen.

Hope someone here can help me find a solution :)

Thank you.

Updated pictures