WATERCOOLING PROJECT...PLEASE HELP

I wanted a quieter pc and after some research decided to embark on a project: Watercooling my PC

I obtained an online guide, but it was long, so I just flicked through to get the general idea.

First off I removed both sides of my PC case, then removed all existing fans and heat sinks including the psu and graphics card (this one was a bugger! I had to use a hammer)

Any way, once finished I half filled my bath (yes I DID use COLD water….duh!)

I CAREFULLY lowered my PC in and turned it on, there was a loud bang and lots of sparks, I reached in the bath to turn it off….and then something strange happened after that….i don’t quite remember what…???

Anyway, I woke up slumped on the bathroom floor, checked my pc, and it still hadn’t booted up, so I tried to turn it on again….NOTHING

Then I realised my mistake…….I only half filled the bath! The top of the case was poking out of the water….DUH

I filled the bath the rest of the way and tried the power switch again….NOTHING…..DAMN.

Do you think I might have over cooked it by using too little water???