Sony launched its large screen Xperia Z Ultra in June with much fanfare.
The highlight of the phone is its big 6.4-inch full-HD display, the
biggest yet on a smartphone from Sony. However, it's that very the
display that looks set to give Sony some headaches.
Xperia Blog has
consolidated several reports of Sony Xperia Z Ultra owners complaining
about issues with the display. Most of the problems seem to happen when
trying to unlock the phone, with the display just refusing to switch on.
A video notes that the backlight switches on as well, and one can hear
the underlying OS sounds as you tap on the screen - it's just the
display that stays off.
A user at XDA forum notes
similar experience when he tried to press the power button of his Xperia
Z Ultra. The backlight turned on but the screen remained completely
blank. He states that the Android runs fine underneath and when pressing
back, home, app or even volume control buttons the device gives audio
feedback. However the display remains blank and the device is unusable.
He also notes that the screen turned on only after pressing the power
key anywhere between 5 and 150 times, indicating the random nature of
Xperiablog notes that several other users on XDA
developers forum and YouTube have voiced their complaints regarding the
phone's display. The report also notes that some display show green
lines when an attempt is made to unlock the device. There is no official
comment from Sony on the issue till now.