LG KG200 Service Manual - Page 25

Capacity/Charging Problems, SIM Problems

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4. Troubleshooting Capacity/Charging Problems Make a general visual inspection for corrosion or oxidation from liquid damage. Charging Insert a working battery and connect a working charger to the phone. If the battery voltage is too low, you must charge the battery without turning on the phone (this will usually take less than 10 minutes) and when the battery voltage is high enough the phone will be able to turn on and show charging in the Display. Check that the system connector (Fig.6.1) is incorrectly soldered, not mechanical damaged, dirty or oxidized. Replace it if necessary. Fig.6.1 SIM Problems Make a general visual inspection for corrosion or oxidation from liquid damage. Insert a SIM card with known function. If the display shows "Insert card" there is a SIM problem. If it shows "Insert correct card" the phone might be SIM locked in this case use a test SIM card. Check that the SIM reader (Fig.7.1) is incorrectly soldered, not mechanical damaged, dirty or oxidized. Replace it if necessary. Fig.7.1 - 26 -

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4. Troubleshooting
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Capacity/Charging Problems
Make a general visual inspection for corrosion or oxidation from liquid damage.
Charging
Insert a working battery and connect a working charger to the phone. If the battery voltage is too low,
you must charge the battery without turning on the phone (this will usually take less than 10 minutes)
and when the battery voltage is high enough the phone will be able to turn on and show charging in
the Display.
Check that the system connector (Fig.6.1) is incorrectly soldered, not mechanical damaged, dirty or
oxidized. Replace it if necessary.
SIM Problems
Make a general visual inspection for corrosion or oxidation from liquid damage.
Insert a SIM card with known function. If the display shows “Insert card” there is a SIM problem. If it
shows “Insert correct card” the phone might be SIM locked in this case use a test SIM card.
Check that the SIM reader (Fig.7.1) is incorrectly soldered, not mechanical damaged, dirty or
oxidized. Replace it if necessary.
Fig.6.1
Fig.7.1