Bad GPS and WiFi are due to a teeny cable

My Problem

GPS was not accurate and WiFi signal strength was goofy. After researching others that has the same issue and resolved it by replacing Logic Board Antenna Flex Cable.

My Fix

Significant tear down to reach the Logic Board Antenna Flex Cable as it is on the underside of the main logic board (which really has no good photo). Lots of screws with just tenths of a millimeter difference. Plan for a long session.

My Advice

The RF connections are extremely finicky. Be patient. Found rotating them a bit while pushing down helps.