Adjacent to the 40-pin EIDE connector there will probably be a block of 6 pins (3 pairs) with labels Master, Slave and Cable Select (or M, S & CS). Make sure that the jumper on your new LG CD-Writer is set to the same setting as your previous CD-ROM drive. This may be sufficient, but if not then go into the BIOS of your machine and on the standard setup screen set all IDE channels to Auto. (Make a note of the current settings in case your machine has been set-up with particular settings).
Nigel, July 2006