I've got a Pioneer DVR 225 which was working fine until last evening. Unit is only about 1 1/2 years old and when I inserted a DVD, received a message: "no disc". Tried several other DVD's (all standard issue, no copies or bootlegs) with same result. Tried unplugging unit for five minutes...same result. Tried an audio CD...same result. Anyone have similar problem or know how to solve this one? Thanks in advance.