G5 PowerPC problem.

My problem with my girlfriends G5 PowerPC, when I boot on the MAC after about 10 seconds it beeps twice and the fans kick on, and the light above the power button flashes twice. This problem only came up when I was trying to fix another problem similar to this with no beeps just no display then the fans would kick on about 2 minutes after being booted on. So I took out the video card and reinstalled (my reason for this is cause there was no display, now I think it was a mistake).
I have tired PMU reset button and reset nvram, with no luck.
I have read up on similar problems with no luck on fixing this G5 PowerPC.
I'm at the point where I'm going to bring my girlfriends computer to the Apple store and have them fix it. If anyone could give me a some in sight on how much this might cost to be fixed.

 

I'm going to buy some ram too see if this works. I will keep you posted.