STM Method :
Tried case power both ways round. Power and reset not mixed.
I'm not a PC guru, and I tend to jump the gun when things like this happen.
(I cleaned my Sony Vaio laptop first time 3 weeks ago, took it appart, cpu was fused to heatsink, ripped it out of the socket, bent pins, ripped it off the heatsink with isopropyl alcohol, anyways, long story short, the whole thing was a disaster after another, when i managed to re-straighten the pins, put it in, put everything back together after cleaning, the thing wouldn't turn on! Just blinking orange on the power button..
Said to myself: 'That's it! I fried my computer, there goes 2000 euros down the toilet'
After a couple of hours of sulking, did some research, and it so happens that this particular model has a switch on the mobo that held the CPU into position, lock/unlocked position, and when I ripped the heatsink/CPU mesh out in one piece, the socket was still in the locked position (didnt realize) and after cleaning put everything back together with a locked socket..
So i re-dissassembled everything, unlocked the thing, re-put the cpu, locked, re-assembled, and lo-and-behold, it worked! LOL
TL;DR - dont get your hopes down, more often than not, with a little research, there is almost always a solution to a problem.