KDL-W40A11E - Sony TV Service Manual (repair manual). Page 15

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AT2X
RM-ED001
Troubleshooting
Check whether the 
1 (standby) indicator is flashing in red.
When it is flashing
The self-diagnosis function is activated. 
1
Count how many 
1 (standby) indicator flashes between each two second break.
For example, the indicator flashes three times, then there is a two second break, followed by another three flashes, etc.
2
Press 
1 on the TV (right side) to switch it off, disconnect the mains lead, and inform your dealer or 
Sony service centre of how the indicator flashes (number of flashes).
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 
no sound
• Check the aerial connection.
• Connect the TV to the mains, and press 
1 on the TV (right side).
• If the 
1 (standby) indicator lights up in red, press TV "/1.
No picture or no menu 
information from equipment 
connected to the scart 
connector
• Check that the optional equipment is on and press 
/
 repeatedly until 
the correct input symbol is displayed on the screen.
• Check the connection between the optional equipment and the TV.
Distorted picture
• Check if any connected optional equipment is installed in front of the TV or 
beside the TV. When installing optional equipment, leave some space 
between the optional equipment and the TV.
• When changing programmes or selecting Text, turn off any equipment 
connected to the scart connector on the rear of the TV.
Double images or ghosting
• Check aerial/cable connections.
• Check the aerial location and direction.
Only snow and noise appear 
on the screen
• Check if the aerial is broken or bent.
• 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).
Picture (dotted lines or stripes) 
noise
• Keep the TV away from electrical noise sources such as cars, motorcycles, 
or hair-dryers.
• Make sure that the aerial is connected using the supplied coaxial cable.
• Keep the aerial cable away from other connecting cables.
• Do not use a 300-ohm twin lead cable as interference may occur.
Picture noise when viewing a 
TV channel
• Select “Manual Programme Preset” in the “Set Up” menu and adjust “AFT” 
(Automatic Fine Tuning) to obtain better picture reception (page 34).
• Select “Noise Reduction” in the “Picture Adjustment” menu to reduce the 
noise in the picture (page 24).
Stripe noise during playback/
recording of a VCR
• Video head interference. Keep your VCR away from the TV.
• Leave a space of 30 cm between your VCR and the TV to avoid noise.
• Avoid installing your VCR in front of the TV or beside the TV.
Some tiny black points and/or 
bright points on the screen
• The picture of a display unit is composed of pixels. Tiny black points and/or 
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 24).
No colour or irregular colour 
when viewing a signal from the 
Y, P
B
/C
B
, P
R
/C
R
 jacks of 
4
• Check the connection of the Y, P
B
/C
B
, P
R
/C
R
 jacks of 
4.
• Make sure that the Y, P
B
/C
B
, P
R
/C
R
 jacks of 
4 are firmly seated in their 
respective sockets.
Sound
Problem
Cause/Remedy
No sound, but good picture
• Press 
2 +/- or % (Mute).
• Check that “Speaker” is set to “On” in the “Features” menu (page 28).
Noisy sound
• See the “Picture (dotted lines or stripes) noise” causes/remedies on page 44.
Audio distortion
• See “Audio Filter” on page 35.
Channels
Problem
Cause/Remedy
The desired channel cannot be 
selected
• Switch between digital and analogue mode and select the desired digital/
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.
Problem
Cause/Remedy
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