hi

Get the manual and electronics plan if possible off the makers. You will need them to see what parts are usable. and what setting they need. Them electronics look badly put together in the first place. Mach3 itself has a bit of a leaning curve, trying to set it up to that macjhine without the settings manual would be extremely hard, doable, but you will need a few weeks to sort it, if possible.

whereas, get the parts identified properly and get the manuals on them, then the others will be in best place to advise you what parts might be usable, whats needs replacing and how to set it up. With the manuals, you will be able to see if the motors and drivers are usable, or what yo uneed to replce them, power them.

So, go dig out the details/manuals, sometimes, you have to ring the makers, send them £ 20 for tea and biscuit money, and promise them you wont publish it anyware ( in case they do service contracts. ), sometimes they are available online