Hi Guys,I have 5 liveries including PMDG

I bet you have saved a flight where the trim noise didn't work and then are saving it again with another livery. That is what happened to me. Load the PMDG Cold and Dark Flight, and configure it the way you want and then save it. Then power up the APU and Elec Hydraulics and see if the trim noise works. Probably will. Delete the flights were it does not work.

Hi Bob, thanks for your answer, probably that