MiTAC 8355 service manual Battery can not Charge

8355 N/B MAINTENANCE

8.2 Battery Can not Be Charged

Symptom:

When the battery is installed but the battery status indicate LED display abnormal.

Battery can not Charge

Is the	No
Notebook connected		Connect
to power (AC adaptor)?		AC adaptor.

Yes

1.Make sure that the battery is good.

2.Make sure that the battery is installed properly.

Battery charge		Yes
			Correct it.
OK?
	No

Replace

Motherboard

Board-level

Troubleshooting

Check the following parts for cold solder or one of the following parts

on the mother-boardand charge BD may be defective, use an oscilloscope to check the following signal or replace the parts one at a time and test after each replacement.

PARTS			SIGNAL
U511	D23	Charge BD	BATT	I_CHG
PU11	PF3	D501	BAT_C	VDD5
PJ502	PF502	R670	BAT_D	BAT_C
PQ12	PD13-PD16	R662	CHARGING	BAT_D
PQ13	PL7-PL10	U13	LI_OVP
PQ14		J3	ADINP
PU9			LEARNING
PU10			I_CTR
PQ508			BAT_T
PQ509			BAT_V

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