原帖由： Jaybird2005 ,
Answer to 2: Alcohol should not cause any corrosion. It is often used as a cleaner for electronic assemblies (now that we cannot get Freon). Some adhesives don't like alcohol much. Most plastics should tolerate it well. Water *may* leave a greenish residue. Copper corrodes into a green dust. Distilled water will not do much harm, Sea water is really bad. I would scrub (gentle pressure) with a soft brush (they sell acid brushes for this purpose) any green residue and probably with a brush that had some alcohol on it. If you need a more serious scrubbing tool, you can trim the bristles to no less than 1/4" long but do not push so hard you bend the bristles. There are lots of sites that teach basic electronics. Most portable devices are really, really complex. Just 10 years ago an iPod would have required a desk full of electronics. In 10 more years it will probably be implanted at birth. Many of the parts are 'programmed' (look up FPGA and ASIC) and you could not make a replacement even if you could get the blank part. Firmware updates can actually change the parts inside! Basic troubleshooting requires some logic and an understanding of what the device does and in what order. You do not need to understand all the parts to be able to do basic troubleshooting of a device. You do need to know how power flows and what signals are needed by which parts. Apple has some documentation for it's developers, but I think you have to 'join' to get access.