Sony PLAYSTATION PSP-3002 - Manual (Page 15)

15 Before requesting service
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Black or continuously lit pixels on the screen do not
disappear.
, LCD screens are made with highly precise technology, but in some
cases, black (dark) pixels or continuously lit pixels may appear on
the screen. This is not a system malfunction. For details, see
"Precautions" (
page 6).
The colour of the screen does not look right.
, If "Theme" under
(Theme Settings) is set to "Original", the
background colour will automatically change at the beginning of
each month.
Video cannot be output to the TV.
, Check that the video output cable is fully inserted into the system
and the TV.
, Some TVs may not be able to output video from the PSP ® system.
, The PSP ® system outputs in the NTSC video format. If a display
is used which does not support the NTSC video format, no picture
will be displayed. Check with the TV manufacturer for details.
When video is output to a TV, black bars are displayed on
the sides (or top and bottom) of the image.
, Because the size of the video image output to the TV for games or
Internet browser screens is predetermined, horizontal or vertical
black bars may be displayed at the edges of the image.
When the PSP ® system is connected to a TV, the screen
suddenly goes dark.
, If "Screensaver" under
(Connected Display Settings) has
been set, the screensaver is automatically activated if no
operations are performed for a certain period of time.
There is no sound.
, Check that the volume is not set to zero. Try raising the volume.
, Check that the mute setting is not on. Press the sound button on the
system front to clear the mute setting.
, When headphones or a video output cable is connected, no sound
is output from the PSP ® system speakers.
The volume does not turn up.
, If "AVLS" under
(Sound Settings) is set to "On", the
maximum volume level is restricted.
, The ear friendly Headphones supplied with PSP-1003 are
specifically designed to limit sound pressure level to a maximum
of 90dB.
, When a video output cable is connected, the volume cannot be
changed using the PSP ® system's volume + button / volume -
button. Adjust the volume on the connected device.
The headphones do not emit sound or the sound contains
noise.
, Check that the headphones are fully inserted.
The PSP ® system's internal microphone does not pick up
sound.
, When a headset (sold separately) is connected, the PSP
® system
receives sound through the headset's microphone. The internal
microphone cannot be used.
Sound