Troubleshooting - Sony KDL-26P2520 Service Manual

PC Input Signal Reference Chart
Horizontal
Signals Horizontal (Pixel) Vertical (Line)
frequency (kHz)
VGA 640 480
SVGA 800 600
XGA 1024 768
WXGA 1280 768
1280 768
• This TV's PC input does not support Sync on Green or Composite Sync.
• This TV's PC input does not support interlaced signals.
• This TV's PC input supports signals in the above chart with a 60 Hz vertical frequency. For other signals, you will see the
message "NO SYNC".

Troubleshooting

Check whether the 1 (standby) indicator is flashing in red.
When it is flashing
The self-diagnosis function is activated.
Measure how long the 1 (standby) indicator flashes and stops flashing.
1
For example, the indicator flashes for two seconds, stops flashing for one second, and flashes for two seconds.
Press 1 on the TV (top side) to switch it off, disconnect the mains lead, and inform your dealer or
2
Sony service centre of how the indicator flashes (duration and interval).
When it is not flashing
1
Check the items in the tables below.
2 If the problem still persists, have your TV serviced by qualified service personnel.
Picture
Problem Cause/Remedy
No picture (screen is dark) and • Check the aerial connection.
• Connect the TV to the mains, and press 1 on the TV (top side).
no sound
• If the 1 (standby) indicator lights up in red, press "/1.
No picture or no menu • Check that the optional equipment is on and press
information from equipment the correct input symbol is displayed on the screen.
connected to the scarts or
• Check the connection between the optional equipment and the TV.
HDMI IN socket
• When connecting any equipment to the HDMI IN 6, 7 socket or when
changing the resolution, some dots can appear blinking on the screen for a
few seconds. HDMI signal decoding is in progress and it does not indicate a
malfunction.
Double images or ghosting • Check aerial/cable connections.
• Check the aerial location and direction.
Only snow and noise appear
• Check if the aerial is broken or bent.
on the screen • Check if the aerial has reached the end of its serviceable life (three to five
years in normal use, one to two years at the seaside).
Distorted picture (dotted lines • Keep the TV away from electrical noise sources such as cars, motorcycles,
or stripes) hair-dryers or optical equipment.
• When installing optional equipment, leave some space between the optional
equipment and the TV.
• Make sure that the aerial is connected using the supplied coaxial cable.
• Keep the aerial cable away from other connecting cables.
Vertical
Standard
frequency (Hz)
31.5 60 VGA
37.9 60 VESA Guidelines
48.4 60 VESA Guidelines
47.4 60 VESA
47.8 60 VESA
/ repeatedly until
Problem Cause/Remedy
Picture noise when viewing a • Select "Manual Programme Preset" in the "Set-Up" menu and adjust "AFT"
TV channel (Automatic Fine Tuning) to obtain better picture reception (page 21).
Some tiny black points and/or • The picture of a display unit is composed of pixels. Tiny black points and/or
bright points on the screen bright points (pixels) on the screen do not indicate a malfunction.
No colour on programmes • Select "Reset" in the "Picture Adjustment" menu to return to the factory
settings (page 17).
No colour or irregular colour • Check the connection of the Y, P
when viewing a signal from the • Make sure that the Y, P
Y, P /C , P /C jacks of 3 respective sockets.
B B R R
Irregular picture when viewing • Check PC input socket connection.
a signal from PC • Connect to PC input socket instead of HDMI IN 6, 7 socket.
• If the connection is only available through HDMI socket, change the screen
resolution to 720p and adjust horizontal and vertical screen size in the
display properties settings of PC.
Sound
Problem Cause/Remedy
• Press 2 +/– or % (Mute).
No sound, but good picture
• Check that "TV Speakers" is set to "On" in the "Sound Adjustment" menu
(page 18).
Noisy sound • See the "Picture noise" causes/remedies on page 27.
Channels
Problem Cause/Remedy
The desired channel cannot be • Switch between digital and analogue mode and select the desired digital/
selected analogue channel.
Some channels are blank
• Scrambled/Subscription only channel. Subscribe to the Pay Per View
service.
• Channel is used only for data (no picture or sound).
• Contact the broadcaster for transmission details.
Digital channel is not displayed • Check that the aerial is plugged directly into the TV (not through other
equipment).
• Contact a local installer to find out if digital transmissions are provided in
your area.
• Upgrade to a higher gain aerial.
General
Problem Cause/Remedy
The TV turns off automatically • Check if the "Sleep Timer" is activated, or confirm the setting of "Off
(the TV enters standby mode) Time" (page 20).
• If no signal is received and no operation is performed in the TV mode for
10 minutes, the TV automatically switches to standby mode.
The TV turns on automatically
• Check if the "On Time" is activated (page 20).
Some input sources cannot be • Select "AV Preset" in the "Set-up" menu and cancel "Skip" of the input
selected source (page 20).
The remote does not function
• Replace the batteries.
/C , P /C jacks of 3.
B B R R
/C , P /C jacks of 3 are firmly seated in their
B B R R