4. TROUBLE SHOOTING
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START
Is I/O Connector(TP1)
well-soldered ?
Re-solder the TP1 (Pin 1 : VBUS_USB)
Yes
Is the voltage
at C275 of TP2 = 4.9V
No
Charging is properly operating
Battery is charged?
Replace the U501
No
Yes
Replace the main board
Battery is charged?
Yes
Charging is properly operating
No
Check the voltage at
Pin 1 of TP2 = 5V?
The TA is out of order Change the TA
No
Yes
No
Change the battery
Yes
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