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8. Level 3 Repair
8-4-1. Power On
Mobile phone does not power on.
Yes
No
Yes
Change the FRONT-UB ASSY
Yes
No
Check the initial operation
Replace the Power key FPCB
Yes
No
No
Yes
No
No
Charging the battery by TA.
If its voltage level is extremely low
(under 3.0V),
Change the battery.
END
Yes
No
Power-on the phone and check
the power-on sound
or motor Vibration.
Sound or Vibration is ok?
No
Check the voltage level at
R3017 while pressing power
key. Is the voltage low?
No
Check the signal of
AP_PS_HOLD(TP6006) = 1.8V
Check the output voltage of U6000/U6003
If the output voltage is not normal, Change the
U6000/U6003
Check the Battery Voltage.
Is it more than 3.8V?
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