Desktop monitor No HDMI signal from your device after working fine for months

I added a 2nd Dell monitor last year after starting to work from home.  It has worked fine for months.   This morning I'm getting the NO HDMI SIGNAL FROM YOUR DEVICE message.  I've tried a brand new HDMI cable with no change.  I haven't made any changes to the desktop resolution or the monitors in the past few days.  Rebooting does nothing.  It's connected to a Lenova desktop.  I ran dxdiag to check graphics per one suggestion but am not sure what to do with this data.   

2160 MB Approx total memory,

112 MB VRAM display memory

1920x1080

HDR not supported 32 bit