Here are some pictures of me swapping 2 PSP motherboards and fixing an UMD drive of one broken psp. The end result is 2 fully functional psp systems. One running firmware 1.5 on a ta-81 motherboard. And the other runs firmware 2.71 on a ta-82 motherboard. Both are now capable of running homebrew code (good link for homebrew: pspupdates.qj.net).