So I learned that my board is out, and I never got any beeps from it when it went (the video at least), so I assume (and the tech repair guy) that the rest of the legacy works.
That's not my point though, as I am looking for one that will fit my parts.
I had a Foxconn nforce 630i/nvidia 7100. The socket: 775 and 2xDDR2. Now my question is, if I buy a new board with the same socket size and same ram slot size, should the rest of the parts be compatible (PSU, Hard Drive, Disk drive), or are there other things to look for?
I'd go for a g31 chipset; they all use ddr2 and most don't cost more than $50. Your chipset is rare; hasn't been made for awhile. You can find the g31 boards at newegg, computer geeks or numerous other sites. Some p45 boards may also use ddr2, but cost more and require a separate video card. You may have to format and reinstall windows; you'll just have to boot up and try it. If windows gets stuck in a loop, you'll have to format. If your system is oem by dell, hp, etc. then you may need a new windows coa and dvd.