Hello. Apologies, I'm a beginner to the hardware aspect, and really need help before I SPEND any money if I can.

I have a HP Pavilion a250y (D7219V) CTO Desktop PC, I think it was 1-2 gigs of ram, and I know neither the video nor sound card were standard, though I forget what they are (was bought this way, with upgraded cards). It had WINDOWS XP home with I think sp2. That's all the specs I can remember off the top of my head.

Yesterday due to the risk of water damage, I had to quickly move the computer out of my room. (The computer did not get wet.) I had shut it down before I started taking out the cables, leaving the power cord for last. Since it was out I also decided to BLOW the dust out of it before putting it back. I took it back in once things were safe and connected everything, and saw the power supply light come on, but when I press the power button, nothing happened. I had no problems before this, so I can only guess either I had started taking the cables off too soon, or I did something wrong when I used the compressed air.

Fortunately my files are on an external hard drive, but if I could still get it back running, I'd be very glad.

Thank you for reading. All help and time is greatly appreciated.Hi,

You may have ACCIDENTALLY disconnected one or both of the wires that go from your power switch on the front of your case to the motherboard while dusting. If you look carefully inside your case, you should be able to tell if this is the problem by following the two wires from the power switch to the board. If they aren't connected, or only one is connected then this is the problem. Let me know if this is the problem, and if it is I will tell you how to reconnect them.Hello, and thank you for the advice. I can open the case on both sides and look, but I have some trouble with following the wires from the motherboard to the switch. Would I need to remove the front of the computer as well to check and see? Because I'm not SURE on how to remove that part.I'm sorry, I made a mistake in the specs, that should read D7219W instead of D7219V, though I'm not sure how much difference it will make to the problem. Again, all time and help is greatly appreciated.There should be a group of pins somewhere on your motherboard, most likely on the very edge in a corner. This is where your front panel buttons and lights connect to the motherboard. Just make sure they are all plugged in.