How Can I Test iPod iPhone Circuit Logic Boards

Okay, now first off, you need the right tools (glad to hear you have the money) I'd start off with a good soldering station, a good magnifying lamp, simple reflow station, a surface mount tweezer tester, and a digital multi meter. Oscilloscope would be nice (never had the money to get one) and a good Infrared Thermometer. To just get into it, especially if you have forgotten some stuff, you can check on here, for a quick reminder of things http://www.repairfaq.org/sam/tshoot.htm I printed it out and saved a copy in my "black Book" amazing how much we can forget in a couple of days. The problem with any and all of this will be to get the schematics for some of the equipment. Apple and a few others in the electronics industry take their board level components and structure very serious. I am a strong believer in keeping schematic and service manuals handy. Keep and accumulate ;-)...You will run into some trouble and frustration without it. Anyhow, that is all I can think of right now, but I am certain more will come to mind....to long for a comment SORRY :-)