Update for anyone who might be interested (Nobody, I'm sure but I have nobody else to talk to about it).
I bit the bullet and made the separate Windows 7 partition to see if the dedicated graphics chip was detected or if the drivers would install aaaaaaand...It wasn't. So it's either broken or simply isn't in there (I'm not taking the laptop apart to check). I'm leaning towards it never being there to start with and the laptop being mislabeled by the guy who refurbished it. It's listed as a TM2t-2200 which has an i3 and ATI/Intel HD switchable graphics. But I've found a model called a tm2-2057sb (small business) that just has the i3 and Intel HD graphics. This adds up as well as from what I've read the HDMI port doesn't work without dedicated graphics in windows 10 but it works fine on mine
Ah well, now I know and