Long time reader, first time poster. Got up yesterday and now have no sound coming from speakers. Tried rebooting both displays, powering down the vehicle and nothing has worked. Called service center yesterday and it spontaneously started working but later in the day it stopped again. Tried the reboot a couple more times without success. Called the technical support line today because my service center is closed. They had me run through the same reboot process without success. Said they downloaded car info but there were no obvious abnormalities. Now, I have no sound with Slacker, regular radio, cannot use my phone in the car, no sound for turn signal or parking alerts. I tried searching the forum for similar problems but didn't find anything. Has anyone else had or heard about this problem? Thanks.