Nice piccies mate!
How about some in daylight
I still say, you'll need to replace the caps or at least some of them. They will leak from the bottom and some you wont be able to check 'cause the cap is seated right on top of the leakage and can't been seen. Check around all caps to see if there is any surface damage to the mobo, a bit like an acid burn.
Good luck with the miggie mate, and I hope you have hours of immense fun with it, whether gaming or modding