Sony TRINITRON KV-SW21M80 Service Manual page 68

Troubleshooting (continued)
Symptom
Picture slant
Abnormal color
patches
Teletext display
is incomplete
(snowy picture
or double images).
(KV-SW21M85/
SW21M81 only)
The 1 (standby)
indicator on your
TV flashes red
several times after
every three
seconds.
The TV screen
sometimes goes
blank for
slightly longer
than usual
during channel
change.
TV cabinet creaks.
A small "boom"
sound is heard
when the TV is
turned on.
• Keep external speakers or other electrical equipment away from the TV.
• Display the "Setup" menu and adjust "Picture Rotation" so that the
picture position is optimal (KV-SW21M85/SW21M81 only) (see P).
• Keep external speakers or other equipment away from the TV. Do not
move the TV while the TV is turned on. Press ! (main power) on the TV
to turn off the TV for about 15 minutes, then turn it on again to
demagnetize the TV.
• Check the antenna cable and connection on the TV, VCR and at the wall
(see H).
• Check the antenna setup. Contact a Sony dealer for advice.
• Display the "Channel Setup" menu and set the "Signal Booster" to "Auto"
from "Manual Program" (see O).
• Try using an external booster.
• Use the fine tuning ("Fine") function (see O).
• Count the number of times the 1 (standby) indicator flashes.
Press ! (main power) to turn off your TV. Contact your nearest Sony
service center.
• The "Signal Booster" is functioning to detect a weak signal. This does not
indicate a malfunction.
• Changes in room temperature sometimes make the TV cabinet expand or
contract, causing a noise. This does not indicate a malfunction.
• The TV's demagnetizing function is working. This does not indicate a
malfunction.
Solutions