My Flip3 started with this issue today. When the phone is closed halfway or more and not plugged in, it shuts off. This happens in safe mode as well.
It does not happen when the phone is plugged in. That sounds to me like a software issue more than display issue. If it's hardware, maybe battery issue? I've seen similar posts on reddit and other sites, so it seems to be a growing problem.
Hello, I can certainly understand how frustrating it is when your device is not working as designed. This article provides some steps that may help with the phone unexpectedly powering off.https://www.samsung.com/us/support/troubleshooting/TSG01002035/
If the phone continues to power off, it is recommended to have the phone evaluated at an authorized service center. You can use the following link to find a list of service centers in the U.S. that can do the repair:http://www.samsung.com/us/support/service/locationor by contacting customer support at 1-800-726-7864.
If you purchased a Samsung Premium Care or Care+ membership with your device, this plan does cover repairs outside of the warranty. You can find more information about this plan here: https://www.samsung.com/us/support/samsung-care-plus/
