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Level 3 Repair
8-3-2. LCD Working
Power Switch On
LCD FPCB
LCD Display
connector is co
correctly connect
On?
rrectly connecti
NO
NO
ned?
Yes
F400, F401,
F400, F401,
F402, HDC400
F402, HDC400
Correctly moun
Resolder
NO
ted?
Yes
Yes
C421
LED_P_24V=24V?
NO
Yes
LCD
Replace U402 & Check
Replace
neighboring circuits
8-9
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