Free Flash Drivers

When I open the FM app it look like that isnt receiving any signal (make that classic radio noise when you can find a radio station). I have use many different handfree to test but the problem is the same.. I use custom rom RR. If is hardware problem can someone help? Used to work very well. If I have flashed wrong aboot, could make that problem appear? And the last I flashed back to stock lollipop 20c (originally was 20a) and the problem is the same.