You can see if it wakes up at all. The board may have microfractures which would not be visible, or it could look like it got stepped on. If you are good enough with the tools to replace the screen, call Dentsply and ask their tech reps for proof of life indicators.
Additionally, these guys have always been pretty awesome to deal with. Very friendly, very knowledgable. Have helped me before both when they've sold me parts and I needed a bit of a walkthrough and even when I called and they told me what to do to fix something that didn't need parts that I thought it did.
That's as much help as I can be my friend. Search for the user manual and service manual if you don't have them.
You will need the drivers for the computer to recognize the furnace. I doubt the MB needs replacing. See about finding a touch screen. If you take the touch screen off the furnace you will probably be able to find a model number. It may be possible to find this part from another source then Dentsply to save yourself the ridiculous mark up.
Prolly neither...
Did you find the oven that @JohnE was going to sell?
not his oven but i found one used very cheap the screen is broken and i heard that it can be replaced or the oven can be controlled externally by a tablet or pc
