|Check the current voltages for what is supposed to be +5v and +12v in the bios Setup - they should be within 10% of the nominal value - if either or both of those are lower or higher than that|
- your optical drive's board will be damaged in a short time if the voltage is too high
- your optical drive will probably not work correctly if the voltage is too low.
If the voltages are too high or too low you must replace the power supply.
If the voltages in the bios are okay, your drive is fried if....
- the drive's disk tray won't open and close when you press the button for that on the front of it, while the computer is running, at any time. That should work even when the data cable isn't connected to the drive - all that requires is that the power connector is connected.
- the led on the front of the drive does not come on when you eject the tray, retract the tray.
- if the led comes on when you eject the tray, insert a disk or have a disk in the tray, retract the tray, then stays on for a lot longer than usual, or blinks on and off for a lot longer than usual. That usually indicates the drive's motor bearings have seized and the motor is not spinning at all, or the drive's motor bearings have deteriorated to the point the motor can no longer spin a disk at even 1X speed - that's the most common reason an optical drive becomes unusable. .