RNG 150 Graphics Squeezed

Yes I STILL use a Cisco RNG 150 (In addition to 4 X1's) - It is a great STB for channel surfing (X1's way too slow.) Anyway, suddenly the graphics on the RNG 150 - the info bar, guide, menu, etc. - are squeezed to a 4:3 aspect ratio while the pic output is still 16:9. While not earth shattering, text is much more difficult to read this way. Not sure how this happened but would like to fix. Tried the HD/ZOOM button, and looked thru the user menus but no luck. I would like to access the diagnostic menu too but I can't find it. Tried about 15 methods I found  googling for it but still no luck. NOTE: I use both the HDMI out AND the analog A/V out (HDMI feeds my HDTV while the A/V out feeds a DVD recorder.) Any Ideas? Thanks in advance.