My Pioneer DVR-109 starts whirring as if trying to spin up the disc or searching when a blank CDR is inserted. I works perfectly with blank DVD-Rs. Problem does not happen when adhesive tape is placed on the hub.
I have cleaned the “eye” and the rubber ring on the spindle.
Next step would be to disassemble the drive and watch to see where the whirring comes from, if it is the spindle or the carriage.
I appreciate your help.