This procedure is bogus. It's more or less ok until the last step: "Once all four flex ribbons are unplugged the green motherboard is free for removal." WRONG! The mainboard is still connected to the battery case, flash module and cmos battery with wires soldered to it. Good luck with that unless you're an expert solderer. I got sucked in thinking I could swap the mainboard from a for-parts sx150is into one with a flakey USB port. Waste of time.
