Preowned Porsche Boxter S was purchased by a new client and the navigation system was in-op. We diagnosed with a PIWIS tester (factory) to see if the proper coding was in-place, which was showing to be fine. On top we saw that there was no fiber optic signal coming from main head unit to the nav control box. All other radio function worked correctly.
Upon further investigation someone was in here before hand and installed an after-market system and popped in place this unit for sale. Disassembled the unit, repaired the communication lines and the fiber-optic cabling. It instantly worked! For any pre-owned vehicle we recommend that you have everything inspected before you make a purchase.