Compaq Presario Series Maintenance And Service Manual page 166

Diskette drive
Power
are provided in the tables below. The procedure for
Problem
Cannot read
compact disc.
Cannot eject
compact disc
(tray-load
only).
CD drive devices
are not
detected.
Hardware installation
CD drive
Probable
cause(s)
CD is not properly
seated in the drive.
CD has been loaded
upside down.
CD may be dirty or
scratched.
CD is not properly
seated in the drive.
Power cycle delay.
CD drive is not
connected properly.
Proper driver is not
loaded
USB ports
resolving hardware conflicts
Possible solution
Eject the CD, then re-insert it, pressing down
on the CD firmly to correctly seat it in the
drive.
Eject the CD, turn it over, then reload.
Clean the CD or load another CD.
Turn off the computer, insert a straightened
paper clip into the emergency eject hole, then
push firmly. Slowly pull the tray out from the
drive until the tray is fully extended, then
remove the CD.
After turning the computer off, wait 30
seconds before turning the computer on again.
Open the computer and check to see that the
drive cable is connected properly.
Restart the system and make sure the CD
drive drivers are loaded.
is also described.