37LV470S-ZC (CHASSIS:LD12B) - LG TV Service Manual (repair manual). Page 54

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Check 
location of 
noise
Identify 
nose 
type
Circuit 
noise
Replace PSU (with LED driver)
Replace LED driver 
Mechanical 
noise
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)
OR
※ 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)
※ 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.
E. Noise 
Circuit noise, mechanical noise
Established
date 
Revised date 
13/14
LCD  TV
Error
symptom
Standard Repair Process
13
2010. 12 .14
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