2004 Radio and CD Changer Dead

My 04 Prius is with out any music at the moment. I noticed that the radio would not power up last evening. this seemed odd because the six CD indicators were all lit as if the system was on. The MFD indicated that the audio system was indeed off. When I shut the car down, the six lights on the CD changer stayed lt.

I disconnected the accessory battery in an attempt to shut everything off. When I did this, the CD changer lights did shut off and have now stayed off. The audio system still will not power up.

I'm wondering if anyone else has encountered this before and can offer any suggestion as to what else I should be checking on. We had 6 inches of rain on Saturday thanks to Hanna, but I didn't drive the car into any standing water that I know of.