The DVD-ROM has two lasers or one laser that switches between two wavelengths. One for CD and one for DVD. The DVD laser or wavelength may have failed in which case you need to buy a new DVD-ROM drive.
The information on Computing.Net is the opinions of its users. Such
opinions may not be accurate and they are to be used at your own risk.
Computing.Net cannot verify the validity of the statements made on this
site. Computing.Net and Compnet Ventures, LLC hereby disclaim all responsibility
and liability for the content of Computing.Net and its accuracy.