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No picture comes out.

Is the input to pins (139), (124) and (133) 
of IC10004 normal?

Check CN10007 and the 
peripheral circuitry.

Check IC10004 and the 
peripheral circuitry.

Is the digital output section of IC10004 
normal?

Check IC10426 and the 
peripheral circuitry.

Check IC10004 and the 
peripheral circuitry.

Is the digital output section of IC10426 
normal?

Check IC10025 and the 
peripheral circuitry.

Is the digital output from IC10025 normal?

Check IC10025 and the 
peripheral circuitry.

Is the digital output from IC10025 normal?

Is the input to pins (141), (126) and (136) 
of IC10004 normal?

Is the digital output section of IC10004 
normal?

Is the input to pins (3), (2) and (1) of 
IC10426 normal?

Check CN10007 and the 
peripheral circuitry.

Check the display side.

MAIN in one-screen mode or two-screen 
mode

SUB in two-screen mode

Is the signal applied to pins (21), (22), 
(24), (25), (27), (28), (30) and (31) of 
IC10413?

Check the parts in the PC I/F unit.

In the case of TV, video and component system

In the case of PC system

Note: The Ref. 
No. of the PC I/F unit is REF.1XXXX.

Check CN10008 and the 
peripheral circuitry.

No sound or picture comes out.

Does the power LED 
light up in green.

Is the Backlight off?

Perform checking 
around IC2204.

Is "LOSS OF SYNC" 
displayed?

To "No picture comes 
out"

Perform checking 
around IC2208.

Is the power LED 
blinking in red?

Is the AC cable 
normal?

Replace the 
AC cable.

Blinking once?

Blinking twice?

Blinking five times?

Blinking seven times?

To "The backlight does not go on"

Check the power unit.

Check the temperature of the set.

Check the 1-bit amplifier unit.

250ms

1sec

LTD operation (1 cycle)

H: ON

L: OFF
H: ON

L: OFF

H: ON

L: OFF
H: ON

L: OFF
H: ON

L: OFF
H: ON

L: OFF
H: ON

L: OFF

H: ON

L: OFF

Table of monitor power LED blinking timing at the time of error occurrence

Error type

Cable error
AVC-side power error
Blinking once: Slow

Lamp error
Blinking once: Fast

AVC temperature 
error
Blinking three times

AVC fan error
Blinking four times

Monitor temperature 
error
Blinking five times

Monitor fan error
Blinking six times

Monitor 1-bit error
Blinking seven times

Monitor power error
Blinking twice

PATTERN R, G and B become effective only when the monitor is started singly.  Each can produce a solid 
filled screen of 256-level gray scale, which can be used for IC wire connection checking when a certain gray 
scale level is not produced.

Dropout (gray-scale-related)

Set PATTERN1 on the adjustment 
process menu to "2".  Is the gray 
scale pattern displayed correctly?

Check the color signal in question 
with the gray scale test pattern.  Is 
there a problem with the contact 
and resistance between IC4501 
and SC4601-4604?

Check FFC 
connected to 
SC4601-4604.

Perform checking around 
IC4501 and SC4601-4604.

Set PATTERN3 on the adjustment 
process menu to "1" to "3" (the QS 
drive test pattern is displayed).  Is 
the gray scale displayed correctly?

Perform checking around 
IC4702 and IC4902.

Perform checking between 
IC4701 and IC4501.

Perform checking between 
IC4901 and IC4501.

Set PATTERN3 on the adjustment 
process menu to "4".  Is the test 
pattern displayed correctly at 
intervals of one dot?

Set PATTERN3 on the adjustment 
process menu to "5".  Is the test 
pattern displayed correctly at 
intervals of one dot?

Perform checking between SC2201 
and IC2206, between IC2206 and 
IC4701 or between IC2206 and 
IC4901.

No picture comes out.

Is the RSET terminal (pin (3)) 
of IC2206 set to "H"?

Perform checking around X2201 
connected to pin (161) of IC2206.

Is X2201 connected to pin (161) of 
IC2206 oscillating (18.26 MHz)?

Is IC2202 operating (CONFIG 
ROM)?

Perform checking 
around IC2202.

Check X2201 and the 
peripheral circuitry.

Is the clock (91.3 MHz) applied to 
TL2202 (pin (102) of IC2206)?

Is the normal synchronization 
signal is applied to TL2202 (pin 
(97) of IC2206), TL2203 (pin 
(96) of IC2206) and TL2204 
(pin (95) of IC2206)?

IC2206 is faulty.

Check IC4903 and the ICs 
(IC4707, IC4702, IC4901 and 
IC4902) downstream from it.

Note that the unit should be replaced when the receiver IC (IC2206), HDCP key ROM (IC2208) or microprocessor 
(IC2004) is replaced.
Applicable unit: DKEYHCO16FE52

Noise is caused to the moving picture when 
the QS drive is set to ON.

Is OSTEMP.AD on the 3rd page of the 
process adjustment mode set to 255?

Is the harness connected correctly 
between the Thermistor PWB and 
Inverter-4 PWB?

Is the board-to-board connected 
correctly between the Inverter-3 PWB 
and Inverter-4 PWB?

Is the harness connected correctly 
between the Monitor PWB and 
Inverter-3 PWB?

Is the input voltage on pin (2) of 
IC2004 (microprocessor) 5V?

TH6301 thermistor 
is faulty.

Check IC4701 and 
IC4901 and the peripheral 
circuitry.

Connect the harness 
correctly or replace it.

Connect the board-to-
board securely or replace 
it.

Connect the harness 
correctly or replace it.

Pin (2) of IC2004 
(microprocessor) is faulty.