Can you share the symptoms you are getting that gives you indication that it's your mobo that's giving you the trouble?
Different problems show up at different times. Here's what happened the last time I tried booting it.
1. Didn't get to bios. Cleaned ram contacts, shifted to another slot. Need to shut power for a minute (otherwise will stay in this mode)
2. Didn't get to bios. Beeped one long and two short. Shifted ram to yet another slot. Need to shut power for a minute (otherwise will stay in this mode)
3. Booted. Ended up at Windows 10 error saying that a file was corrupted
4. Booted. Ended up at same screen as before
5. Booted. Got into windows. Worked. Started windows update. Left computer to run for a while & went off. Came back, no signal to monitor, unresponsive keyboard & mouse.
6. Booted - didn't get to bios. Need to shut power for a minute (otherwise will stay in this mode)