There are clickspots on the 777 overhead that are inop using CP.  Not all, just some.  Examples, Eng 1 demand hydraulic pump, left wing fuel pumps, exterior lights, pos, beacon, logo.  Most others work fine.  This applies to both the V3 and V4 versions of the 777.  If I kill CP and use the default PMDG overhead views all is OK.

I'm using the latest experimental version of CP .

Disable experimental version and go back to a more stable 2.50, and see if your problem continues. Right now there is a lot of issues with the latest experimental version, and until Keven gets back and resolves them, all you're going to do is frustrate yourself.

Must be something else specific to your system. I'm on v2.85 Exp. and everything on the 777 OVHD (and everywhere else for that matter) works fine. This is in P3D v4.

Oh great,

 

There is nothing really unique on my system.  Are you running FSUIPC5?  The only other addons I have installed are GSX and AS.

Yes, I'm running FSUIPC 5, GSX, AS2016/ASCA.

One other thing to check - the placement of your viewpoint in the different views. Make sure you're not blocked by the headrest.

Try a different camera angel and zoom. Save and test!

 

Cheers