What brand of binder is stuck to the board? Does it have a plastic disc that can be easily replaced with a simple email to customer service? If so then you can always cut apart the disc to allow full access to the stuck bolts. Then a simple pair of vise grips, with an extension for a little leverage, will solve the problem.
This way you avoid using a torch or an impact driver on the board, not so good for your board. If in fact the shop used loc-tite on your board NEVER LET THEM TOUCH YOUR BOARD AGAIN.