LG 47LA790V Service Manual page 101

Standard Repair Process
Error
LCD TV
symptom
Identify
noise type
Mechanical
※ 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.
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Only for training and service purposes
Circuit noise, mechanical noise
Check location
Circuit
of noise
noise
Check location of
noise
noise
E. Noise
Replace PSU(with LED driver)
OR
Replace LED driver
※ 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)
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Established
2012. 12 .06
date
Revised date
LGE Internal Use Only