I have tried installing two CD drives on my computer, but for some reason it will not work. I originally had the old drive as the slave, and my newly purchased drive as the master. I then made a connection with the DIGITAL audio cable from my sound card to my new disc drive and connected power to both of them. After all of that, I turned on the computer and the HP recovery screen came up (I have an HP computer) and the screen stayed like that for a few seconds. After about 30 seconds or so, Windows XP booted up normally but I cannot see any of my drives in My Computer. I also cannot see them under the system hardware tab. After that unsuccessful attempt, I tried switching the drives around. I put the new drive under the slave and the old drive under the master. It still wouldn't work. However, I do know that my new drive works because I connected the new drive by itself and it worked just fine. Why isn't both of them connectable on my system? How should I have them configured? Is it just a bad cable or is there SOMETHING ELSE that I'm not doing right?How was the old drive jumpered. They need to either be on cable select (CS) which would make the master the one farthest from the motherboard connection, or one as Master one as Slave. Again, the original connection will let you know how the computer expects things to be set up.

Are the drives recognized in the BIOS? What model HP is this and what OPERATING system?Yeah - you can't just install them. On many PCs you also need to enter the BIOS and ensure that they are recognised there (use the autodetect option).