I did a system update 8 days ago for Samsung s9 and the screen when blank with a green line across the top. Took me 10 minutes to get the phone back on since then it's happened two.more times but come back on within few seconds. Anyone else with this issue. New update seems to have caused to screen to crash since update. I can hear it working in background but screen takes time to respond.
@Craig G: I'm sorry to hear that you're experiencing this issue. Does the problem occur when you're using a particular app or feature? If you press the Volume Down and Side Keys together for around 10 seconds until the phone restarts, do you notice an improvement?
No it started with the system update and other two times I wanst in any apps. I did what you suggested after first time. But today when it happened I tried turning off mobile and taking sim out and Putting back in. Hoping that sorts it.