I forgot to say that switching the input/output direction did not work either. However, this device was advertised to function both as "HDMI 2.0 Switcher 2 in 1 Out" and "HDMI Splitter 1 in 2 Out".
I am having some problems trying to use an HDMI switch between a Lenovo laptop (X13 Yoga) and an Acer monitor (ET322QU Abmiprx). I connected one HDMI cable from the laptop to the single port on the switch and another HDMI cable from one of the other two ports on the switch to the monitor. I...