How old is your Toshiba desktop PC? I'm not familiar with the brand but Google turned up a PC World link from 2001 claiming that Toshiba was stopping production of desktops at that time and a quick look at the Toshiba web site didn't turn up any current consumer desktops. My point here is that your Toshiba could be old enough to have some hardware problems.
I've also read that some parallel port chips used low voltages and that this can be a problem for Mach, though that seems to be a more common problem for laptops.
FWIW, my Dell desktop PC is in the stand enclosure with no supplemental cooling and it seems to be working fine aside from some false limit switch triggers that were probably related to wire routing inside the cabinet. I do leave that compartment door open though and the mill is in the basement where it is generally 75 °F or less.
I'd check with Tormach and see what they have to say. If you have another PC, I'd be inclined to try that out as well.
Mike |