Harman JBL BAR 2.1 - HDMI ARC Connectivity Problems

HDMI ARC cannot
work
HD
MIARCcan
notwork
Go
Insteadof
new26pinline
Checkthe26pincable(XP9)t
omainboardof
connect
y
esornot.?
Re
place the old with the newHD board to
theEUTworking.
Replacethe
HDboard. 
No
Yes
No
Yes
Checkfrom
mainboardtheU14isnormal?
（SYS_5V_ADC、SYS_3V3_ADC）
Replacethe
U14
YES
ReplacePCBA
formainboard.
NO
5-4