LG 410G Service Manual page 45

4. TROUBLE SHOOTING
CHECKING FLOW
Check Battery Voltage
Push power-on key
And check the level change
Check the voltage of
The LDO outputs at U101
Replace the main board
LGE Internal Use Only
START
> 3.35V
YES
of PWON
YES
NO
YES
V_SIM= 1.8 or 3V, V_USB=3.3V, V_RTC=1.8V
NO
Charge or Change Battery
NO
Check the contact of power key
Or dome-switch
Replace U101
V_EXTL=1.8V, V_EXTH=2.8V, V_MMC=2.8V
V_IO=1.8V, V_ABB=2.8V, V_MEM=1.8V ,
V_PLL= 1.3V
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Only for training and service purposes