I have a HP Pavillion a630n PC and it has the HP DVD Writer 400c installed.
Previously, I experienced brief times when the drive completely stopped reading any DVD disks. This included commercial DVDs, DVD+R, and DVD+RW. This would always be corrected with a reboot of the system.
Currectly, that has not fixed the problem reading DVDs at all. The drive works fine for CDs and CD-ROMs. There seems to be a separate lens that reads DVDs. This is the only thing that I can think of that makes any sense.
My PC is only covered by Best Buy because it is now older than one year. I want it to be fixed because I paid for the drive. But I don't want to lose use of my PC for a week or two just to replace a drive.
Trying to get HP on the phone now. If I can't get some straight answers out of them, I will file a BBB complaint. This problem seems to be widespead and should be dealt with by the BBB.
I have checked the software and drivers for the drive and all are working properly.