50PB4RT-MA (CHASSIS:PP78B) - LG TV Service Manual (repair manual). Page 24

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20. DVR
Start check
Is Timeshift Mode 
"On" in Menu? 
Is connected cable? 
(P1300, P1302)
Is operated 
IC1300,IC1302
normally?
Change Timeshift Mode
from off to "On"  
Connect a cable.
P1300, P1302
 
Replace the IC1300, IC1302
YES
YES
YES
NO
NO
NO
NO
LED is Green 
Doesn’t work time shift mode.
Can’t enter to recorded list
Can’t record AV/RF/Component
Is operated 
IC1500, IC1501
normally?
 
Replace the IC1500, IC1501
Change HDD
YES
 
W
 Symptom
 
W
 Check follow
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