crwdns2934241:0crwdne2934241:0 mike

crwdns2934249:0crwdne2934249:0:

It could possibly be a driver issue as the display works with the BIOS screen.

When connected to the external monitor what video driver shows up in the Device Manager?

This Lenovo web may help you;

https://pcsupport.lenovo.com/us/en/products/laptops-and-netbooks/yoga-series/yoga-7-16arp8/diagnostics-troubleshooting

There are service guides, troubleshooting, driver updates, etc.

crwdns2915684:0crwdne2915684:0:

open