KDL-22CX520, KDL-32CX520, KDL-32CX523, KDL-40CX520, KDL-40CX523, KDL-46CX520 - Sony TV Service Manual (repair manual). Page 102

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KDL-EX723/EX720/EX523/EX520/EX423/EX420/CX523/CX520
4-268-265-12(1)
Troubleshooting
When the 
1
 (standby) indicator is flashing, count how many times it flashes (interval 
time is three seconds).
Press 1 on the TV to turn it off, disconnect the AC power cord, and inform your dealer or Sony service 
centre of how the indicator flashes (number of flashes).
When the 
1
 (standby) indicator is not flashing, check the items in the table as follows.
Also refer to “Troubleshooting” in the i-Manual. If the problem persists, have your TV serviced by 
qualified service personnel.
Additional Information
Condition
Explanation/Solution
There is no picture (screen 
is dark) and no sound.
Check the antenna/cable connection.
Connect the TV to the AC power and press 1 on the TV.
If the 1 (standby) indicator lights up in red, press "/1.
Tiny black points and/or 
bright points appear on the 
screen.
The screen is composed of pixels. Tiny black points and/or bright 
points (pixels) on the screen do not indicate a malfunction.
Some programmes cannot 
be tuned.
Check the antenna or dish.
The TV turns off 
automatically (the TV 
enters standby mode).
Check if the “Sleep Timer” is activated, or confirm the “Duration” 
setting of “On Timer”.
Check if the “Idle TV Standby” is activated.
Check if the “Presence Sensor” is activated. When no viewer is 
detected in front of the TV for a preset time, the picture automatically 
turns off, while leaving only the TV sound on. Additionally, after 30 
minutes in picture off mode, the TV will switch to standby mode.
The remote does not 
function.
Replace the batteries.
Your TV may be in SYNC mode. 
Press 
SYNC MENU
, select “TV Control” and then select “Home 
(Menu)” or “Options” to control the TV.
The “Parental Lock” 
password has been 
forgotten.
Enter 9999 for the PIN code. (PIN code 9999 is always accepted.)
The TV surrounds become 
warm.
When the TV is used for an extended period, the TV surrounds 
become warm.
You may feel hot when touching there by the hand.
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