Panasonic DMR ES25 "Cannot read. Please check disc"?

Good Afternoon:
I have a Panasonic DVD Recorder DMR ES25 that is saying "Cannot read. Please check disc." "No read" displays on the screen. I have taken the top off, cleaned the hub / spindle; I do see light emitting from the laser; occasionally I get the error U 61; I have tried holding the power button for 1 minute; the disc does spin while it's trying to read a disc. Any suggestions?
Regards,
Jason