My M3 has just developed a strange problem: There are white lines at the top portion of the screen. Because of this, the title bar is almost unreadable. The white lines are interleaved, and it appears only at rows 2, 4, 6, 8 and 10.
I've tried:
1. updating the firmware
2. format
3. low level format
3. downgrading the firmware
All to no avail.