LITE-ON DVDRW LH-20A1P does not recognize blank disc

[qanda]This thread is about the Lite-On LH-20A1P. Click here to see full specs[/qanda]My LITE-ON LH-20A1P does not recognize any blank media. This happened before (a few weeks ago) but updating the firmware fixed the problem. Now it’s suddenly back to doing the same thing. Whenever I insert blank media the drive hangs at trying to recognize it. No newer firmware is available. Any ideas to what might be the problem?