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Check technical 
information
- Fix information
- S/W Version

N

Y

Technical 

information?

Check 
input 
signal

Signal
input?

Y

N

External Input and

Component

Recognition error

Check and fix 
external device/cable

RGB,HDMI/

DVI, Optical

Recognition error

Replace Main B/D

Replace Main B/D

Fix in 

accordance 

with technical 

information

Check 
location of 
noise

Identify 
nose type

Replace PSU (with LED driver)

Replace LED driver 

Check location 
of noise

OR

※ When the nose is severe, replace the module
(For models with fix information, upgrade the 
S/W or provide the description)

※ If there is a “Tak Tak” noise from the 
cabinet, refer to the KMS fix information and 
then proceed as shown in the solution manual
(For models without any fix information, 
provide the description)

OR

※ Mechanical noise is a natural 
phenomenon, and apply the 1st level 
description. When the customer does not 
agree, apply the process by stage. 
※ Describe the basis of the description 
in “Part related to nose” in the Owner’s 
Manual.

Replace module

Zoom part with 
exterior damage

Replace cabinet

Replace remote controller

Replace stand

Replace module

Zoom part with 
exterior damage

Replace cabinet

Replace remote controller

Replace stand