Non-profits need newer PC’s

Hi, a first-time poster. I am pulling what’s left of my hair out. I volunteer to do PC work for a couple of different non-profit organizations in the Minneapolis, MN area. Instead of helping them design and implement better solutions for them better serve their clients, I’m spending most of my time keeping their old PC’s running. If anyone knows of a business that would like a tax write-off, I would be glad to facilitate the donation of at least some PII’s or older PIII’s to these non-profits.

Thanks in advance for any help.