My Viewfinder Indicators aren't working my my Pentax 645NII!!! HELP!

[sper]

I just bought a new Pentax 645NII off Fleabay and everything looks great, and appears to be working properly, except I can't see any information in the viewfinder! I've tried resetting the custom functions, and using both a loaded insert and an unloaded. I contacted the seller, but I also wanted to
post here and see is there is something I missed?

Am I doing something wrong, or do these go bad sometimes?

Help! Thank youuu!

 

[HLing]

You've of course checked the obvious (forgive me) and pushed the LED button that's on the left side?