Compaq Presario 700 DVD-ROM SD-R2102 problem

[eRmi5]

hey,

i have a compaq Presario 700 laptop, namely 734EA.

one day all of a sudden the DVD could read no DVD discs any more!
(CDs are fine though)
It is a TOSHIBA DVD-ROM SD-R2102

Now, I 've heard that more than a few people have the same problem...
Error message is either "No Disc Found" or "Damaged Disc"

Anyone can help???