Harman JBL BAR 2.1 - Troubleshooting Guide; Keys Not Working Troubleshooting

Keys
do not work
keysdo
notwork
Go
No
Replacethe
oldwiththenewKEYboard
totheEUTworking.yesornot？
Yes
Replacethe
keyboard. 
No
Yes
Checkfromm
ainboardtheSTB_3V3
powersupplyisnormal?yesornot？
Check6pincab
le(XP6)tomainboardof
connectyesornot.?
Insteadofne
w6pinline
CheckKEYsig
nalfromMCUmodule(U11)
inmainboard. 
Yes
No
Replacethe
MCUpartorotherloadparts

Che
ckthemainboardtheMCUmodule
(U6)othersupplynetworkload
par
ts(
for
example:STB_3V3_MCU).

Yes
ReplacePCBAformainbo
ard.

No
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