Ok just read thru this thread and the fact it was working before moving and no changes made other than new PC then logic dictates the fault is with the PC and the PP port or PP driver. It's certainly the first link in chain that needs to eliminated.
Suggest you go back to basics and start at beginning.
Also some PC's use parallel port cards that are not compatible or work on different address to what's set in mach. Some also only output 3.3v and your BOB could require 5v.

So firstly are you using the PP cable which ran the machine before.? If you have replaced the pp cable it must be a straight thru cable (null modem), pp printer cables are often not and cross over pins so cannot be used.

Next I'd delete and reinstall mach3 and the PP driver with new download using latest driver to elimimate any chance of software corruption. Write down the settings you know worked before deleting.
Re-enter settings in new mach install, don't use the old xml as it could be corrupted.

After this then you can move onto the electrical side. To be honest if not PP Issue then I'd just buy a cheap £5 BOB. This instantly tells you if old one is the issue.


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