Arghh, my laptop is refusing to display to the external monitor.

I worked without the monitor for a few weeks in 2020 when they shut down the office to 'flatten the curve.'   But I am really missing having it today.   And the next two regular days I have people coming in, the PC support person is on PTO.   I can't think how to test the monitor.  Perhaps my phone would connect  to it.   

I sprayed weeds yesterday,  just 2.2 gallons and felt like I was done in.   I did do some inside tasks later, but had no energy to do anything more outside, even if I wasn't half nervous that dad might need assistance.   He didn't need anything until he went to bed at 7.