It is possible to upgrade to IPS display in a T420. This is a starting point. It needs a special controller card and ofcourse an upgraded screen. https://www.c

It is possible to upgrade to IPS display in a T420. This is a starting point. It needs a special controller card and ofcourse an upgraded screen. https://www.curlybrace.com/words/2020/11/24/thinkpad-t420-ips-pls-screen-upgrade/ https://www.curlybrace.com/words/2020/11/24/thinkpad-t420-ip... https://www.amazon.com/1080p-1920X1080-Upgrade-thinkpad-Controller/dp/B07N4Q9YCF https://www.amazon.com/1080p-1920X1080-Upgrade-thinkpad-Cont...