|Did you plug in the power connector?|
If it's IDE
- most of this info is probably in the Owner's or User's manual for your model if you had bothered to look
- if your drive came with documentation, most of this info is probably in that if you had bothered to look
There is a jumper block with 3 pairs of pins on the back of the drive. There is a jumper on two of the pins.
There are usually letters printed or incised into the plastic near the pairs of pins - MA, SL, CS
New drives usually come jumpered either cable select or master. (CS or MA)
Either way will work if the drive is by itself on a data cable, but if it's jumpered cable select it's supposed to be connected to the END connector on a 3 connector cable, not the middle one.
If you install the new drive on a data cable with another drive on the same cable, either
- both drives have to be jumpered cable select (CS),
or - one is jumpered slave (SL) , the other master (MA).
Don't mix cable select and master/slave jumpering for drives on the same data cable.
All desktop IDE data cables have 40 (or 39) pinhole connectors, but they can have 40 or 80 wires.
An 80 wire data cable has a blue connector on one end - that end must go to the mboard.
All modern hard drives must be connected to an 80 wire data cable in order for them to be able to run at their faster speeds, because they are capable of UDMA 66, UDMA 100, or UDMA 133 burst data speeds. .
Your new DVD drive must be connected to an 80 wire data cable in order for it to be able to run at it's faster speeds, because it is capable of UDMA 66 burst data speeds.
All CDrom or CD burner (only) drives, all DVDrom drives, and older DVD burner drives capable of burning SLOWER than 16X DVD+R or DVD-R can use a 40 wire data cable if they are by themselves on a data cable, or on a data cable with another such optical drive.
It is common to un-intentionally damage IDE data cables, especially while removing them - the 80 wire ones are more likely to be damaged. What usually happens is the cable is ripped at either edge and the wires there are either damaged or severed, often right at a connector or under it's cable clamp there, where it's hard to see - if a wire is severed but it's ends are touching, the connection is intermittant, rather than being reliable.
Another common thing is for the data cable to be separated from the connector contacts a bit after you have removed a cable - there should be no gap between the data cable and the connector - if there is press the cable against the connector to eliminate the gap.
80 wire data cables are also easily damaged at either edge if the cable is sharply creased at a fold in the cable.
Try another data cable if in doubt.