Put Escort passport 8500 X50 into calibration mode.

Radio shack

Sorry, dumb question, but I need to ask. The volume control on the left side is also the on/off switch, have you accidentally turned that off?

last time i looked on there forum they had stopped serv. on them and also selling. Might wanna check but i think you may have to buy a new one.

copy and paste for owners manual (https://www.escortradar.com/pdf/8500x50manual.pdf )

You will find the nearest Escort dealer here.

I take help from online websites that have this service like helping in repair some like reliable-store have instant help.. others are a bit slow which I don't prefer... rest is up to u.. U get free manuals

you will have to call escort to see if they have parts available.

if its when your driving, then its picking up alarm systems.

If you are not on a major highway this is less likey.

the unit has city mode and highway mode.

If you put it on city, it will go off less from alarm systems.

Are you getting any Self Calibration or Service Required error messages? If not, then this means that the basic electronics are good and that the problem is within the antenna. If your X50 is in warranty then Escort will repair the antenna for free. If not, then there will be a service fee ($80). Yet I can all but guarantee you that after Escort fixes the antenna problem then you will never have this problem again.The service fee also includes fully testing and calibrating your X50, and updating its internal computer firmware code to their latest code. So the end result is that your X50 will perform just like a brand new one.

Only Bel/Escort has the expertise and instrumentation to recalibrate your radar detector. They automatically do other things whenever you send in a RD for service. For example, aside from diagnosing and repairing any issues (I think that your RD's antenna needs to be replaced or repaired), they also recalibrate it, fully test it, and update its internal computer firmware to whatever the most recent firmware is. In short, when your RD comes back, it performs just like a brand new RD.