4. TROUBLE SHOOTING
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START
Is the LCD Backlight OK?
Replace LCD module
LCD working well !
Check the soldering
Condition of CN400
Re-solder LCD Module
No
Yes
Yes
Check the voltage atTP2= 2.8V ?
Yes
Check the voltage at each pin of TP3
changeslow to high?
Yes
Does LCD Work Properly?
Yes
Re-solder C400
No
Re-solder resister connected faulty
pin.(R495~499)
No
Replace LCD Module
No
Is the voltage of TP1 is upper 2.5V?
Check the soldering
Condition of CN400
Re-download
Re-solder LCD
ModuleReplace
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