I've had my phone since new in September last year. Two nights ago, I left it with the screen on and instead of fading and going into sleep mode, it flickered madly. The same to a lesser extent when pressing the power button to switch on.
At the advice of Samung - and with reluctance - I did a factory re-set and that seemed to solve the problem. Having spent yesterday afternoon re-jigging all my apps and settings, contacts, etc, the problem re-occurred.
I did a security scan before doing all this, and that checked out fine.
Before going to the additional hassle of taking it to Samsung, does anyone have an insight into this? Thanks, Chris