I have a Bridgeport interact 1 with a tnc 151. It came with a tnc 151 A manual so I assume that is what I have (it has a rs232 port if that helps)

How can I tell which version I have?

The power supply went bad in the control. When looking for a replacement I came across a tnc 155Q for sale.

My understanding is that the difference between the 151 & 155 is just the graphics?
What are the differences between the versions?? Would I be able to switch the 155Q for mine??

At the very least would they use the same power supply?

All help welcome.
Thank you