Here's a nicely compiled repair guide for your PSP, organized by wanclickid, and duly tipped to us by pspx256. The PSP Ultimate Repair Guide v.1 provides you a step by step how-to on several hardware issues.

Featured in this tutorial are the steps for PSP disassembly, LED tutorial, what to do when your UMD does not read, power switch replacement, analog replacement, and more tips for repair. It's actually simplified yet comprehensive, so am sure it'll be helpful to the new users out there. Only thing lacking for me would be a "Back to Menu" button.

Again, thanks to pspx256 for the tip!