CD burner problems

[Lightft85]

Hi. Microstudio worked great as soon as I installed it, for a while. A couple of weeks ago, the CD part of my laptop's CDR/DVDR stopped working. DVDs of all kinds are still fine but no CDs are even recognized, not the CDR brand/lot that formerly worked, not a different brand and not even pre-recorded/purchased CDs. I have tried some obvious things, like Win/My Computer, which says the drive is working properly but shows 0 used & 0 free on CDs of all kinds. When I use Win Explorer and try to look at CDs through Exlore or Open, it causes the drive to eject.

I have even tried compressed air to clean the drive.

Any suggestions out there? I have specs, etc available.

So far, MTU Live Support has been unable to help.