I just bought an FBV Shortboard MkII that I am using on my new Spider Valve MkII 212.  At any point while using it the amber backlight on the FBV Shortboard MkII LCD Display will shut off.  Is this normal?  Is there some kind of energy conservation thing that shuts that off?  If so, how do I turn it back on?  Nothing I do seems to awaken it.

Thank you