NEC Express5800 Series Maintenance Manual page 57

Chapter 1 Maintenance
[?] Data read out from a CD-ROM or a DVD drive is broken or data cannot be read out.

If contamination or residue is left on the surface of CD or DVD, clean the drive and the disc. In case a
label is attached to the surface of disc, remove the label and the residue of adhesive.

Check whether the device supports the specification of disc.
[?] Unable to detect a CD-ROM or a DVD drive.

Check whether there is a poor connection.

Check whether the drive or the cable is not damaged.

Update the driver to the latest version.
Express5800/R120h-1E, R120h-2E Maintenance Guide
5. Troubleshooting
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