My Sony dream machine is making a chirping sound when I insert a cd. I do not know how old it is but my guess is that it may be 3 or 4 years old. What is wrong?

There could be a few different things causing the chirping sound when you insert a CD into your Sony dream machine. It could be a problem with the CD itself, such as a scratch or smudge that is causing the machine to have difficulty reading it. It could also be an issue with the CD drive itself, such as a malfunctioning laser or a dirty lens. Without more information or the ability to physically inspect the device, it is difficult to say for sure what the problem is. It is recommended to check the CD for any scratches or smudges, or try cleaning the lens of the CD drive. If the problem persists, it may be best to seek the help of a professional technician.