I personally would have to make some serious hardware changes.
If there is any issue with the motherboard then I'd get a working motherboard first, one small issue can lead to more issues..
I made that suggestion, but she wants to be "cheap" in this case. I was trying to help her. I even offered to sell her a computer that I made last year. I told her it was worth a lot more than I paid to build it. She said "no thanks", and asked me to do what I could with the one she had. I personnaly agree with you, and made my case known, but money is money. It is kind of funny that she spent $190.00 so far to help me try to "fix" it.