Re: Replacing Logictech Harmony - nothing but problems
I have a Harmony 650, no IR extenders, and it works ok. I find it sensitive to how it is pointed at my system. If it doesn't set everything the first time correctly, there is the help button which runs through activity steps to help fix. My activities appear to be more complicated than yours, as I have more than sources, TV, AVM70 involved in most (e.g. miniDSP where I switch presets depending on activity).
Is your wife trying to watch tv in surround or just using the tv speaker? If only the TV, why not set the Anthem HDMI standby to the cable box...don't even need to turn on the 740...and program an activity on the Harmony to watch TV only (eg not in surround). I do something similar - one activity for over the air TV (I dropped cable years ago), one for Roku-TV (to stream just using the TV speakers), and one for Roku-TV-AVM70 (surround).
* LG OLED65E6P, BenqHT2050A
* Anthem AVM90, Rogue ST100, VTV Pascal 7 ch
* Sierra Towers/Horizon (all ELX RAAL), S2EXv2 surrounds, HTM200SEx4 heights, Rythmik E15HPx2
* VPI Classic 1+ (VTA & Fatboy Gimbal), PE Eagle/RR, VAS NOVA, Soundsmith Paua, Manley Chinook, Bob's Devices SUT, SugarCube 1 mini
* Oppo 203 & 103D, EverSolo DMP-A6
* miniDSP Flex, Audiosensibility & Blue Jeans cables, Symposium & Isoacoustics, GIK
* For RDJ: Anthem MRX720, Sierra LX, Luna Duo v2 center, CXNv2, TBD