Here ya go madmax,
I went to install a NEO12 on my buddy's v9. Without reading the instructions fully, I applied hot glue and stuck it. But then I saw I was supposed to tin the bottom pads and mount directly to the board. D'oh! Long story short, I rigged it up anyway since it was stuck. (I thought of using a blowdryer later that night) Powered up, cd tray shot out immediately, no display at all. Opened it up, 2 things: (1)power and two signal cables had been mashed somewhat...its possible they didn't short, but I could see the wire under a thin remains of insulation in one spot. (2)Its possible that I bridged some pads directly underneath the chip when I rigged it. Of particular suspicion would be the short, braided wire I used for ground. One little strand could have been on a neighboring pad. I'm sure I didn't totally bridge the piss out of everything, I'm not a novice solderer. I removed the glue with the blowdryer and re-mounted it correctly, replaced said wires from problem 1).
Now the ps2 won't play any discs at all: I hear no activity in the drive. I double-checked the ribbon cable connections.