[ALUG] DVD-RW drive refuses to read CD-R disks

Hi everyone, I'm perplexed - I've got a DVD+RW drive that refuses to read CD-Rs and other CDs, but these disks can be read in my laptop's DVD+RW drive. Manually mounting such CDs gives me: mount: No medium found I know I can read some factory-pressed CD such as the EF2000 CD (lovely game). My drive is: LG HL-DT-STDVD-RAM GSA-H55N and was purchased in very early 2008 I believe. Laptop drive is: HL-DT-ST DVDRAM GSA-T40N (Which I believe is also an LG) Is this likely to be a hardware fault and I have to buy a new drive? Thanks Srdjan