No signal detected

Hi I have had my computer for about 2.5 years now. I have encountered some issues but that was fixed by replacing computer case. However
just recently I ran into the problem that the topic states I get no signal from my gpu to my monitor. and my monitor is pretty new so I doubt that that's the problem. so anyways I managed to fix the problem later that day by taking out and putting in the CMOS and reseating the GPU. Happy that I got it working again I didn't bother putting in the side fan cord, and then went to sleep.

The next day I set the fan pins in and got the fan spinning but now I got no signal on my monitor again. So I did the same fix as last time, but this time it wouldn't work.

my system specs:

ASUS p5q-e
Intel q6700 quad core
ASUS 9600GT 1024mb
silver power 600W PSU
NZXT guardian case
Kingston 2x2GB DDR2 RAM

I would really appreciate any input even if the result would be replacement