Dell monitor S2721H not connecting with MacBook Pro - says 'no HDMI signal from your device'
My S2721H Dell monitor was connecting with my 2020 MacBook Pro for weeks with no issues. Then, all-of-a-sudden, I started getting the 'no HDMI signal from your device' message on the monitor. For a few days I could unplug and plug things back in and it would start working. Then a few days later the macbook pro got where I had to restart it to get the monitor to work.
Then just yesterday I tried all the tricks that have worked in the past, but nothing made the monitor connect with the MacBook Pro. I've unplugged and plugged HDMI cords, power cord, adapter, etc. to no avail. Restarting my computer no longer works.
The adapter I'm using is: USB C Hub HDMI Adapter for MacBook Pro / Air Swith and Other Type C Devices, USBC Digital AV Multiport (6 in 1 Dongle with Ports of typec USB 3.0/4K HDMI/SD/TF Card Reader) Type-c Multi Docking
I've plugged my macbook pro HDMI cord into my Sony TV and it works as an extended display like the Dell monitor used to. That would rule out my HDMI cord and adapter being the issue. The Dell monitor works with my husband's PC. I've made sure my macbook pro has the most up-to-date software/securities.
So is this monitor not compatible with MacBook Pro's from 2020 and if not, why did it work for a while but not now?
Help!!
MacBook Pro 13″