All of a sudden a vertical green line appeared on my Galaxy S20plus Display. After a month, received an update, than another green line appeared! Then another one. Earlier green ylines becomes white lines now. Samsung Bangladesh, India, Vietnam is replacing display and battery free of cost in these cases. Even in phones, out of warranty. We Bahrainian users also demand replacement free of cost.
There is water which went in it
Later your screen will become completely black if you dont fix it mine also became like this
For assistance, please visit one of our authorized Service Centres to check it for you. You may refer to the link it will guide you to the nearest service centre to your location https://www.samsung.com/ae/support/service-center/