Sony HMZ-T3W Reference Manual page 40

 Video
Symptom
No video, or output video
is distorted
The screen is dark or
blurry
A bright portion of an
image is too bright, or a
dark portion of an image
is too dark
The screens suddenly go
off
Image display dims over
time
40
 When selecting "Side-by-Side" or "Over-Under" in "3D
Display" (in "3D Settings"), change the setting to "Off"
after viewing 3D content (page 29).
 Make sure to disable video output with the Deep Color
signal on the connected equipment. If this option is not
available on the equipment and the content is being
output at 1080FP (Frame Packing), change the resolution
to 720FP.
 Also check section  Audio/Video (in common), or 
Wireless.
 Refer to the "Startup Guide" and confirm that the AC
adaptor and HDMI cable are connected correctly, and
that you are wearing the head mounted unit correctly.
 The lens span may have been adjusted incorrectly
(page 26). Perform adjustment again by accessing "Lens
span adjustment" in the setting menu (page 28).
 If the lenses in the head mounted unit are dirty, wipe
them with a soft dry cloth to clean them.
 The phenomenon may appear when the RGB signal level
of the input signal is beyond the level specified by the
HDMI standards. Adjust the RGB signal output level on
the connected equipment or change the "HDMI Dynamic
Range" setting of this system (page 35).
 Check the "Picture Mode" setting and change it to an
appropriate mode (page 30).
 After 3 hours of continuous viewing, the system will
display a warning screen and go off after 90 seconds of
inactivity. If you clear the message and continue
watching, the system will automatically go off after
another 3 hours to encourage healthy viewing habits.
For details, see "Prolonged viewing warning" (page 37).
 Wear the head mounted unit correctly. 10 seconds after
the sensor in the head mounted unit detects that you
have removed the unit, the displayed screen will
automatically go off. For details, see "Power off when
unmounted" (page 36).
 The system will be turned off automatically if 30 minutes
elapse without signal input when "No signal Standby" is
set to "On" (page 36).
 Although image display of photos or nearly motionless
images may dim over time, this does not indicate
system damage. To restore normal brightness, perform
some operation on the head mounted unit or the
connected equipment directly.
Cause/Action