Recently swapped the keyboard on my 2009 MBP 15" 3.06ghz (and changed the thermal paste). After reassembling it it decided to boot into a white screen of death (WSOD). The start-up chime is there, and the superdrive makes the boot up noise. Fan speed goes right up to 100% the moment i press the powerbutton, and the macbook turns completly unresponsive. I've tried booting with some of the cables and the HDD detached etc. Its worth noting i managed to tear the trackpad ribbon cable and i've hard that it might cause problems, but not this severe. I've got one ordered, but i doubt it will make it will make the macbook work again. Advice on what to try?