Hi, I'm hoping someone can help me. The other night my husband vacuumed out the dust inside my computer and after hooking everything back up and turning on the CPU, the screen remained blank on the monitor. The orange power light was on, but never turned green like it does normally.
I have an HP Media Center computer, with Windows XP. The machine does start, the fan runs, and it sounds normal to us(no beeps, no weird noises-I don't remember hearing any beeps upon startup before).
We have tried the following solutions:
Hooked up the monitor to my husband's laptop, the monitor worked;
Reseated the video card;
Checked for loose connections or missing pieces;
Rechecked the monitor connection;
Cycled the computer power by completely unplugging it and holding the power button for five seconds then plugging it back in;
Taken out the CMOS battery and put it back in;
Replaced the video card with a new one, albeit it was one that had not been checked by us on another system as we have no other system to use to check it(the old video card was an AGP, the new one is a PCI, we tried that in case it was the AGP slot that was damaged);
Taken the video card out of the slot while the machine was on, checking to see if it beeped(that was suggested as a way to test the motherboard at this or another site).
My husband right now is taking the computer tower to test it with another monitor to see if that works. We can't think of anything else to do short of taking it to be serviced, and we were hoping to avoid that cost. If anyone here can help me that would be great. I'd really appreciate any tips, hints, or advice.