Haier 48LTV3002 Service Manual page 23

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7. OSD is unstable or can't work normally
OSD is unstable or can't work normally
No
Key board connected properly? Reconnect the key board
Yes
No
Replace the button function
Buttons are OK?
Yes
No
Replace the key board
Key board is OK?
Yes
Enter factory mode to do "Reset"
No
Replace the main board
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