Probably not,

but the back of most power supplies have a slider switch that swaps between 115v and 230v. Double check that it did not get swapped during the hardware upgrades.

Try reseating the main power connector to your motherboard. The connection may seem tight, but the smallest amount of dust or other debris can cause the connection to fail. Remove it and plug it back in.

Past that I would double check that the risers (Small plastic spacers) between the case and the motherboard are doing their job and not shorting out the board.

-Chris