Troubleshooting - Sony KDL-20S4000 Operating Instructions Manual

Troubleshooting

Check whether the 1 (standby) indicator is flashing in red.
When it is flashing
The self-diagnosis function is activated.
1
Measure how long the 1 (standby) indicator flashes and stops flashing.
For example, the indicator flashes for two seconds, stops flashing for one second, and flashes for two seconds.
2
Press 1 on the TV (top side) to switch it off, disconnect the mains lead, and inform your dealer or
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
No picture (screen is dark) and
no sound
No picture or no menu
information from equipment
connected to the scarts or
HDMI IN socket
Double images or ghosting
Only snow and noise appear
on the screen
Distorted picture (dotted lines
or stripes)
Picture noise when viewing a
TV channel
Some tiny black points and/or
bright points on the screen
No colour on programmes
No colour or irregular colour
when viewing a signal from the
Y, P /C , P /C jacks of
B B R R
Cause/Remedy
• Check the aerial connection.
• Connect the TV to the mains, and press 1 on the TV (top side).
• If the 1 (standby) indicator lights up in red, press "/1.
• Check that the optional equipment is on and press
the correct input symbol is displayed on the screen.
• Check the connection between the optional equipment and the TV.
• When connecting any equipment to the HDMI IN 6 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.
• Check aerial/cable connections.
• Check the aerial location and direction.
• 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).
• Keep the TV away from electrical noise sources such as cars, motorcycles,
hair-dryers or optical equipment.
• When installing optional equipment, leave some space between the optional
equipment and the TV.
• Check the aerial connection.
• Keep the aerial cable away from other connecting cables.
• Select "Manual Programme Preset" in the "Set-Up" menu and adjust "AFT"
(Automatic Fine Tuning) to obtain better picture reception (page 24).
• 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.
• Select "Reset" in the "Picture Adjustment" menu to return to the factory
settings (page 18).
• Check the connection of the Y, P
• Make sure that the Y, P
3 respective sockets.
/C , P /C jacks of
B B R R
/C , P /C jacks of 3 are firmly seated in their
B B R R
/ repeatedly until
3.
31
GB