4. TROUBLE SHOOTING
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START
Check the Voltage Level of
TP5 is about Battery voltage ?
Resoldering or Replace U302
Yes
LCD working well !
No
Is the connection of
TP1 with LCD connector ok ?
Reassemble LCD connector
No
Check the Waveform of
EMI filter ?
Re-download & check the State of U101
No
Yes
Does LCD work properly ?
Yes
Yes
Replace LCD module
No