Read LG 32LB9DE (CHASSIS:LA75C) Service Manual online
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Chec k i n p ut c o nn ec t JK6 02.
Can yo u s ee t he n o rm al w avef o rm ?
Chec k DDC c o m m un ic at io n lines
( IC601 Pi n5, 6 )
( IC601 Pi n5, 6 )
Chec k t he inp ut o f PI3HDMI341ART( IC600)
This s i g nal i s TMDS.
Can yo u s ee t he n o rm al w avef o rm ?
YES
YES
NO
JK602 m ay have p ro b lem . Rep lac e t his Jac k.
Chec k t he o ut p ut o f PI3HDMI341ART( IC600 ) .
Can yo u s ee t he n o rm al w avef o rm ?
YES
Chec k t he in p ut an d o ut p ut o f BCM355 2.
Es p ec i ally yo u s ho uld c hec k The H, V
s ync an d c lo c k.
Can yo u s ee t he n o rm al w avef o rm ?
YES
NO
NO
Af t er c hec ki ng t he t rac e o f TMDS li nes and p o w er o f
PI3 HDMI34 1ART, yo u s ho uld d ec id e t o rep lac e
PI3HDMI341ART o r n o t .
PI3HDMI341ART o r n o t .
NO
YES
This b o ard has b ig p ro b lem b ec aus e Mai n
c hip ( BCM355 2) have s o m e t ro ub les .
Af t er c hec kin g t ho ro ug hly all p at h o n c e ag ain , Yo u
s ho uld d ec id e t o rep lac e BCM3552 o r n o t .
Af t er c hec kin g t he Po w er o f t hi s c hip , yo u s ho uld
d ec id e t o rep lac e t his o r no t .
Af t er c hec kin g t he Po w er o f PI3HDMI341ART yo u
s ho uld d ec id e t o rep lac e PI3 HDMI34 1ART o r no t .
YES
Chec k HDCP c o m m un i c at i o n li nes
( IC102 Pi n5, 6)
NO
Af t er c hec kin g t he Po w er o f t his c hip , yo u s ho uld
d ec id e t o rep lac e t hi s o r n o t .
5. HDMI doesn’t display
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