Today, I received my new video card in the mail so I decided to try and install it into my current custom computer. However, the cable management was so terrible that I had to unplug a few obstructing cables since the HD 5850 was as long as the motherboard. I don't remember which ones but I think it is probable that they may have been the motherboard and CPU connectors. Next I had to plug 2 6-pin PCI-E power connectors into the HD 5850. After that, I tried to turn it on but it wouldn't turn on. For the last 6 hours or so, it has been a routine of unplugging cables (all the cables in my computer: SATA, power, etc.), pushing the reset and on/off button, and I also took the power supply out and put it back in once (and I rerouted some cables). I tried to touch the case with any part of my body when possible (usually elbows, fingers, palm, etc.). A few times I may have unplugged cables and installed components when the power supply was plugged in. More recently, my dad took a look at the problem but he kept thinking it was the CPU fan, thinking it was loose but I never touched the fan and this morning, it worked. Another hypothesis he formulated was that stray connectors or cables were touching other components and such but to be honest, I have no clue. He dealt with the CPU fan very harshly and I believe the action was uncalled for but he started banging the fan with the screwdriver handle, and it appeared as if he was exerting too much physical pressure on the fan. Still, I think the computer should turn on regardless if the CPU heatsink or fan is tight or loose because when it is loose, the computer should turn on and then notify the user of the temperature and turn off automatically. But, when I try to turn the computer on, the fans don't move, no sound is emitted from the computer, and there is a green light that is on, and I'm not sure if the light means the motherboard is still alive or not. And I still have some skepticism towards the state of my other components, such as my power supply. At the moment, I am using a laptop while my dad is still scratching his head. Any suggestions?