1508(RM-388)
Baseband Description and Troubleshooting
Nokia Customer
Care
Issue 1
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Checking USB
6. Check if the bottom insert of the mobile phone is well connected.
7. Check if the COM of the computer is well connected and confirm the
configuration of the COM setting.
8. Check the welding of the mobile phone connection, whether there is foreign
impurity
9. Check if the VBUS, D+, D- and etc. are in their normal status.
10. Check if the USB over-Voltage IC works normally.
11.
Check the welding of CPU.
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