Motherboard for presario sr1611nx any ideas?

I'm working on a PC for s lady. The hard drive has a working copy of WIN-XP home, but the PC does not bot up at all. Black Screen and no lights on the keyboard. I replaced the p/s and still nothing. Where can I get a good price on a motherboard for this PC? Thanks,
Computer Dude (C.D.)

 

Be sure it is the motherboard before replacing, check your power switch first by shorting out the PS_ON pins at the motherboard with the tip of a screwdriver if still nothing disconnect everything except CPU, memory, power supply(also pull out the drives power connectors), speaker and power switch. Also try some different memory or try taking a bar out if you have more than one and alternate them.

This maybe a real dumb question but have you tried a different power lead?

 

Thanks for the reply! I've checked more things, and the power supply works. When the power button is pressed, the p/s comes on, but there are no post error beeps, and no video. I replaced the video card, I've taken one memory module out leaving only one, tried boot with that one and nothing. I reversed it using the other, and still no video or anything. I looked and their is evidence that the monitor plug on the motherboard has been bent and dammaged, and I still get no beeps or video. Do you think it's safe to now replace the mother board? Thanks for the input!
Tony

 

Thanks again for the reply! I've checked more things, and the power supply works. When the power button is pressed, the p/s comes on, but there are no post error beeps, and no video. I replaced the video card, I've taken one memory module out leaving only one, tried boot with that one and nothing. I reversed it using the other, and still no video or anything. I looked and their is evidence that the monitor plug on the motherboard has been bent and dammaged, and I still get no beeps or video. Do you think it's safe to now replace the mother board? Thanks for the input!
Tony