Windows 10: How do I fix a flickering external monitor?

I have a Lenovo Yoga that has been a great laptop. When I am attached to an external monitor, the screen jumps around. It seems the screen will zoom in and out quickly. This only happens when the laptop is closed. I changed the setting that allows me to continue working on an external monitor when I close the laptop. I have tried different HDMI cords. I have tried different external monitors. I have updated all of my drivers. I have just dealt with the problem for years but would like to know if there is a fix. Any help would be appreciated.

:)

 

External Monitor blinks and flickers

I have a YOGA 900 connecting to external monitor through c port to HDMI adapter--external monitor screen blinks on and off and flickers. I have tried disconnecting all cables holding power button down for one minute with no change. Is this a setting, a
windows 10 issue, an adapter issue, or what?

 

Monitor Dim and Flickers

I have a new Dell Inspiron 3668 cpu and running it with my old Dell ST2010 I have run the windows "troubleshoot screen flickering in Windows 10" from Windows help. When I go to task Mngr. it still flickers. So, I uninstalled the display driver as suggested
and then ran the "Check for updates". The problem still remains. Any further suggestions?? My next step is to just replace the monitor and assume Windows 10 will not run it!

 

Monitor flicker

Hi,

Screen flickering in Windows 10 is usually caused by an incompatible app or display driver. As an initial troubleshooting step, we suggest following the steps provided in this
article and see if it will work for you.

Get back to us with the result if you need further assistance.