I'd be surprised if you couldn't get the parts to repair a normal desktop motherboard. But as far as I know there aren't really any repair shops that work on stuff like that. Likely because the motherboards in most desktops are fairly cheap and easy to replace. On laptops, the main board is the most expensive part. More so ever since everything started being soldered on instead of socketed.
Maybe the solution is to getting people to repair desktop motherboards instead of tossing them is to turn the cost to the environment of generating e-waste into an actual monetary cost. (Though I can't say I know how you'd do that since making e-waste disposal cost money will mean that people will just dump that stuff in the normal trash)
Maybe the solution is to getting people to repair desktop motherboards instead of tossing them is to turn the cost to the environment of generating e-waste into an actual monetary cost. (Though I can't say I know how you'd do that since making e-waste disposal cost money will mean that people will just dump that stuff in the normal trash)