Is it possible that whomever you purchased this from tried to perform an update, and loaded the incorrect version? (although I don't know how the machine would accept it).
As I recall you had mentioned this was a refurbished unit, so perhaps they replaced the damaged card with the incorrect part?
There should be no harm in doing a factory reset, but ask the seller first.
I owned the 665 prior to owning the 675, and other than HDR and a 10.2 Gb HDMI input, the two are pretty similar.
On the 665, only one of HDMI inputs is enhanced, the second one is not (I forget which one this is).
I think you can test the inputs as mentioned previously and see if both accept the enhanced inputs (any 4k HDR signal). If they do, it is a non-US 675 (or if it does not a 665).
Theater: Lyngdorf MP-50 7.3.4, Sony VW675ES, Revel Ultima Salon2/Voice2/Gem2(4)/Paradigm Be Atmos (4), Mark Levinson amps (53 L/R, 532 Center biamped, 531H side/surrounds), Atmos amp: Sherbourn, Oppo 203, Roku Ultra Premier+, DTV 4k, Velodyne 1812 Signature (LFE), Velodyne DD-15.
FR: Marantz 8802A (and/or 7703), Sony XBR 4k TV, Meridian A350 LCR onwall, Dali in-wall surrounds, Atmos Martin Logan in-ceiling, REL sub, Oppo 105 (and/or 103), DTV, AppleTV, Sony 4k Media Server.
Last edited by normandia; 03-03-2018 at 12:58 PM.