After getting your message I changed the jumper from "Master" to CSE as that is what was on the old SONY drive. (Why do they call this an 80 pin drive instead of 40 when it really has only 39 pins?) I turned computer back on and went to Device Manager. LG drive is listed but has yellow circle w/exclamation point and (Driver has been disabled...Code 32) message. Driver is listed as Microsoft 5.1.2535.0, which is same as SONY was and is same as my working hard drive. Clicking on troubleshoot recommends uninstall and reinstall.
I went to LG site, as suggested by Best Buy and found 2 versions of firmware. I took the older one, without the Windows 7 stuff, and downloaded that. After doing the recommended extraction I clicked on "Run" and got the center label "ATAPI Device cannot be found", which I assume is the new LG DVD drive.
Am I doing something wrong? Should I call LG? I can't tell you how much I appreciate having someone answer my questions.