Bush A632N - Display and Key Board Troubleshooting

27
No Display (LED Indicator Green)
Key Board
OSD is unstable or not working
Is Key Board connecting normally?
C
onnect
K
e
y
B
oar
d
Is Button Switch normally?
Replace Button Switch
Y
Is Key Board Normally?
Replace Key Board
Check Main Board
N
N
Y
Y
N
Check the source
OK
Reset source
Check LVDS cable
NG
Reset LVDS cable
OK
Check IC901, IC902
NG
Replace IC901 or IC902
OK
Check U400
NG
Replace main board
OK
Check panel
NG
Replace panel
Check IC950, IC951
NG
Replace IC950 or IC951
OK
Check T801
NG
Replace T801
OK
NG