The center panel display went blank on my 2005 Toyota Avalon and the radio/CD player stopped working. A couple of days later it came back on and started to work again. There must still be a problem but the dealership said it would be hard to determine if it's working. Any suggestions?

SOURCE: Toyota Avalon 2000 xls cd player does not work

If you are using "home-made" or "burnt" CDs, this can happen. Sometimes, you can remove the radio from the dash, and unplug it. That may reset the CD player, and the discs will eject.
It works for me about 85% of the time. Hope this helps.

SOURCE: toyota avalon csx 2000 cd player

I had the same problem. It is probably the laser reader for the CD player. I took it in to the dealer and was referred to a vender as the warranty had expired. I took it the vender 10 days ago and just had it re-installed today. Works well. BTW, the dealer took it out and send it to another company which repaired it and sent it back.

SOURCE: Audio display text went blank. cd won't work, radio memory blank

Check for blown fuses

SOURCE: 1991 Toyota Camry Broken Speedometer

You need to get that engine light checked out to see if its related or not. The fault is either in your speedometer it self, the wiring, or the speed sensor. Testing them is pretty complicated and do to copy right laws i can not post them but if post your email i can send them to you if you wish.

SOURCE: The radio in my Toyota Avalon 1995 stopped

Most likely you need a radio, it give you all sings of going bad.