KNC Titan cube not starting

[wolverine5pl]

I recently bought titan on eBay.  One cube got damaged Durring transport.  Heatsink lose (screw holding it got lose)  which i think is common.  I managed to put it back with some DIY.  Was hashing fine.  Then unplugged it and now its dead and on top of it psu shuts down when connected to that cube.  Any idea why? How to fix it?

Sry if I posted in wrong category

[XERES]

Did the lose screw come off again once you disconnected it, Also are you sure the PSU is working properly. I dont know if there is a way to test that on a KNC as i think the PSU is built in if i am not mistaken

[wolverine5pl]

Nah. screw was in place. so i removed everything to check board. and i cant see anything wrong with it:(
Pictures of board: