HP Pavilion a1210n Problem

Hello,

Hello,
Hey guys i've had some problem with my Hp heres a bit of history of whats going on;

I was playing a game online and it started storming quite suddenly before i had a chance to shut down my power went out. And as karma would have it my power supply got fried aswell. After a fewdays of shopping around for the correct power supply i couldnt find the correct part in town so i had to order it.

The Problem
After receving the power supply i proceded to connect the power supply as carefully as i could. After connecting all the cables into the nodes(I'm not very upto date on computer tech slang). I turn on computer to see if it would boot up. The power came on but the monitor didnt have a picture, looking into it abit it turns out i forgot to connect the monitor power node, so i proceded to connect it and tried to boot it up. The computer was slowly making a beeping noise and there was no picture still. I'm not very skilled at computer repair but i do know a bit, but i can't for th life of me figure out whats wrong. I unplugged both the RAM upgrades i have and dusted them off and very carefully put them back and still no cigar.. I cant find anyFAQ for this...So here i am, Please help me! I'm very behind on my work and i have some very important imformation on my computer.