Well, if you can borrow one from a neighbor…the one thing I haven’t had you do is check the actual thickness of the material.
Older draftboard tends to absorb humidity badly, making it swell in places and not cut through completely. Medium draftboard is supposed to be about .125" thick. Mine never is, because I live in a very humid environment on the coast…it generally swells to from 0.134" to 0.139" with the humidity. When that happens, I have to slow down the cuts a little to get through in one pass…183 speed is just too fast.
Another thing that you can do is change the material height in the manual settings to correctly reflect the actual thickness. It will over-ride the defaults. But it’s generally easier to just slow it down by about ten points.
Anyway…checking the actual thickness of the wood might point out that the problem is just with that sheet of draftboard. (Which would save you the round trip and wait on the replacement machine.)