justme4now’s suggestion of a possible bad HDMI cable could easily be the culprit. HDMI connectors are extremely fragile and can be broken with even the slightest amount of pressure. Switching the cables out is a good test.
why dick with it is brand new take it back
” HDMI connectors are extremely fragile and can be broken with even the slightest amount of pressure.”
Fifteen years of pushing and yanking HDMI cables and nary a failure!