I have a Yamaha CRW-F1 cd writer, which shows strange results in burnings since some weeks. I also have some power calibration errors, although this device hasn’t even burnt 200 cds yet. What can this be, I have made a photo of a high quality Mitsubishi disc, please note the strange concentric rings on the disc. This phenomena also occurs with TY and other media, regardless of the drives firmware.
What do you think this might be caused of, and what should I do now?