On Dec 7, 2004, at 12:11 PM, Justin R.Miller wrote: > Barring repair, a friend has a recently deceased Ti 550 with a combo > drive and I'm wondering if it's compatible with my model. Does anyone > have an idea, or else a good resource to find out? I got an excellent resource - Apple PowerBook G4 parts list. The Combo drive in all 667's (and also the 800/867/1 GHz) is a Matsushita CW-8121-C, Apple part # 661-2596. The part # for the 550 is the same. -- Chris