Can anybody show me the location of the barometer on the mainboard of the phantom advanced / pro.. Thanks!

I don't know, but they are usually a small "tin can" component with a breather hole in them to let the atmosphere in. If you examine the board for a component that looks like this, you should have it.  There should only be one of them and I would suspect it lives on the main board.

thank you... i know how it must look like.but there is no component on the mainboard with that looks.    hey DJI people.. where is the  barometer located?.. or is it called the one  who must not be named