As with some Open Source licenses, there must be a way to prohibit the commercial use of the hardware designs, while still allowing other parties the ability to produce and sell the motherboards and other components needed to assemble the proposed laptop, or completed laptops, at cost, or with a predetermined small profit amount added on.

I'm not an expert regarding any Open Source licenses, but I'm pretty sure that there are any number of ways to write a license, to make it fit what you are trying to accomplish. And I agree that the designs should not be just given to anyone without any restrictions, so that the manufacturer can make all the profits, without having to pay for any of the design costs.