I have an after market radio. It has always worked. Yesterday it didn’t work at all. Today it didn’t work when I started the car but it came on by itself after about 10 minutes. Worked as normal for about 10 minutes then “froze”. Couldn’t change volume or change the channel. When I turned the Jeep off the radio didn’t turn off. Pulled the fuse and it still didn’t turn off! Had to disconnect the battery. Any ideas?