you may want to start a new thread, as this one shows up as looking for info on an h400, and I see now that we are looking at an h40, which many more folks will be familiar with.
AS this is an impco spectrum system, the flash codes can be retrieved, but if you have training and a cable and software for other spectrum systems, then you are a few steps ahead. have you ever worked on a spectrum system?
www dot impco dot ws/spectrum-test-tools dot asp