|I don't know what harm can come from it. As far as different media goes, there are TWO lasers. One for CD media and one for DVD media. The intensity of the laser varies with the task. Burning requires more intensity than reading. CD, CDR & CDRW require different intensities as does DVD, DVDR & DVD RW. Then there is DL (Dual Layer disks).|
Desktop burners are disposable hardware, IMO. You can buy a new one for under $30 shipped.