I'm new here and I'm not sure if this is the right forum category but here goes:
Yesterday morning I planned to open up my Compaq Presario cq5110y because I wanted to see what kind of onboard stuff I had, so I unplugged everything from the back of the computer and let it sit for a few minutes then I brought it out and opened the case to take a look.
I didn't even touch anything I just looked around to see what kind of PSU I had, so after I found that I had a 300W (which I found out that I could have just looked it up on the HP website *facepalm*) I closed the case back up and plugged it back in and when I pressed the power button the computer turned on with the lights and stuff but it didn't show up on my monitor.
I tried all the simple stuff like changing monitors and the like, and nothing worked it's still the same.
So after looking up my problem on various websites and seeing all the possible problems I tried the fixes like reseating all my stuff and none of that worked either, so before I get a POST card and see what that brings up, I want to ask you guys.
TL;DR: My computer will turn on but the monitor stays black and then goes to sleep mode. When I open the case and turn it on the PSU turns on and stays on but the CPU fans start for about 3 seconds and then just stops. The only things that seem to be working are the PSU and the disc drive because they make the typical whirr sound...
Did you take the motherboard out? The cpu fan turning on and shutting off is generally related to a short somewhere. I don't know if you accidentally got a wire or screw stuck behind the motherboard or what, but I'd imagine something is shorting it.
You could take the motherboard out and give it a good dusting and reseat everything back in. Seems like a lot for just opening up your computer to look at the psu, but something in the move happened to bump or move.
Nah, I wouldn't worry about you shorting it. It's still turning on and the items work for a second then auto shut off when it realizes there is a short. You find the short you'll find the computer still works fine.