I need some help! I finished the board today, and checked the regs first to see if the voltages were correct. It was looking good, as the positive rail was all o.k. 3.3, 5, and 12 were all o.k. and not overheating or anything. Sadly, the -12 reg is at 0V. It's not due to the power supply either, because that is reading +/- 15V. The only thing I can figure is that I burned the LM317 while I was soldering it to the board. Maybe I should have used a paper clip! So, any advice? How do you desolder a LM317? Short of doing that, I could use the negative rail from another +/-12V psu, but then I will have two different grounds going into the board. I should also say, I know it's not the design that is flawed, because one of the testers definitely had the negative rail working. Well, I'll say one thing for the board. It's pretty, and not too difficult to build, at least, compared to what I thought.