DVD writer not recognizing DVDs

[munigkumar]

My dell studio 1555's disk drive doesn't recognize DVDs while it does all CDs.
Also with the CD inserted, the data transfer speed 1-4mbps only. please help me guys, i wanna install W7. I am now running vista home premium.

 

[Mark56]

There are two lasers in the drive, one for DVD and the other for CD. sounds like the DVD laser has failed. The only other problem may be a dirty lens so try running a lens cleaning disc through it. If that fails you will need a new drive.