Thinkpad: What is this display of the coner side white colour showing issue...is
What is this display of the coner side white colour showing issue...is that will be the display going?
It's common issue of old TN panels getting bad. Unfortunately xx30 generation models other than X230 are difficult to replace IPS panel. The best panel you can get for now is the AUO B156HW01 V4.
Besides most of TN panels (or screens) suck, including what you're using. If possible try to check B156HW01 V4.