Acer Altos R520 M2 Series User Manual page 145

ODD (optical disk drive) activity indicator does not light.
Do the following:
• Make sure the SATA ODD cable is properly connected.
• Check that relevant switches and jumpers on the drive are set
correctly.
• Check that drive is properly configured.
ODD tray cannot be ejected.
Insert the tip of a paperclip into the small hole on the ODD drive.
Slowly pull the tray out from the drive until the tray is fully extended
then remove the disc.
ODD drive cannot read a disc.
Do the following:
• Make sure you are using the correct type of disc.
• Make sure the disc is properly seated in the drive.
• Make sure the disc is unscratched.
• Make sure the drive's SATA ODD cable is properly connected.
Hard drives are not recognized.
Do the following:
• Make sure the disk controller is not disabled in the BIOS setup.
• Make sure the drive is compatible.
Bootable DVD drive is not detected.
Make sure the Boot option setting in the BIOS setup utility is
configured to allow the DVD drive to be the first bootable device.
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