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– 8 –

2-4. LED Pattern
When safety shutdown occurs, Standby LED display reports the
cause by using the lightning patterns as indicated below.

Example:

The figure above shows LED display when
SHUTDOWN is caused by DC_ALERT. It repeats
flashing for a specified number of times in 0.3sec/
cycle and has a 2 seconds interval of lighting off.
Please note that a 2 seconds interval of lighting off
is fixed regardless of abnormal state types.

2.0 sec

2.0 sec

0.3 sec

0.3 sec

 LED Typ e

       Description

Remark

Status

Display

Power LED

 

Remark

 POWER

  

Green: LED

    Green lights at power ON.

 STANDB

Picture Off/
Timer

Y

 

Red: One LED

 

Red lights during standby.

  Green/Amber
  : Two LEDs

   Green lights during Picture 
   OFF and amber lights 
   during Timer activation.

POWER ON

 

Green lights

OFF

in a normal state.

STANDBY

OF

OFF

F

Red lights

Red flashes

Microcomputer is

in a sleep state.

Failure

Classify the trouble
causes by the no.
of red blinking.

Standby LED

Microcomputer is

Standby 

Light Sensor/
Remote Control
sensor 

Picture Off/
Timer 

Power 

– 9 –

Blinking times

Error

Countermeasure

2 DC_DET Replace either/

both  z

 Power board

- IP1F (40")

z

BA Board

5

DC_ALERT

Replace BA board.

6

BACKLIGHT

Replace either/both

z

 BA board

z 

Panel

7 INTERNAL TEMP Replace either/

both  z 

Power board

- IP1F (40")

z 

BA board

8

AUDIO

Replace either/all

z

Power board
- IP1F (40")

z

BA board

z

Speaker

10

DIGITAL FE/DE

Replace BA board.

13 BALANCER Replace either/

both  z

 Panel

z

Power board
- IP1F (40")

14

T-CON

Replace either/both

z

Panel

z

BA board

2-5. Standby LED Error Display
Perform below countermeasures according to Standby LED blinking times.

Note: Each of the above blinking repeats 2 seconds.

– 10 –

 

  

BA

 Board

HSW Board

IP1F Board

T

-CON Board

Speaker Unit

RF Module

Panel Module

LV

DS cable

Joint Connector

Flowchart

Problem

Doubtful Part

A(i & ii)

A(i & ii)

A(i & ii)

A(i & ii)

A(i & ii)

A(i & ii)

A(i & ii)

DD

C

C

C

C

C

B

B

Few Possibility

Low B+

Low B+

T

emp

Audio

Balancer

T

-CON

Digital

BL

Reference

  

Symptom-(Dead Set)

(Refer Section 3: 

Tr

oubleshooting (for flow chart reference))

Vi

deo- Distorted or Missing

2

Blinks

5

Blinks

6

Blinks

7

Blinks

8

Blinks

10

Blinks

13

Blinks

14

Blinks

No

Power

No V

ideo

BL

 OK

OSD OK

No V

ideo

No BL

No T

uner

Vi

d

eo OK

No

HDMI

No

Audio

Tu

n

er OK

Vi

deo 1-3 

Bad

No V

ideo

BL

 OK

No OSD

– 11 –

No Power/Shut down/No Picture

Try On/Off at Main SW
and with Remote Commander

Is it LED(STBY) 

indicator turn on 

or blinked?

Is Connection at 

Wire Harness correct?

 

 

Check Harness holder, Header pin

and Wire harness.

Is it bended or damaged?

(If yes, replace it with a new one)

Count blink and replace board to 

obey with 2-6 triage chart.

Refer Section 3.2 Board 

Replacement Order.

Yes

No

Power source is out of order. 

Other circuit block is out of order 

except for Power board. Check 
STBY3.3V Vcc line and circuit.

Yes

No

2, 5, 7, 10, 13 blinks,
No Video/No BL, No Power

3.3V_DC

CN1300 3PIN on 

BA Board

Does Power 

Button work?

BA Board 

Yes

Yes

Yes

AC Cable or AC Inlet

IP1F(No STBY 3.3V)

Switch Unit

No

No

No

176-264VAC

Inlet on

IP1F

Destination