Nokia 1508i Troubleshooting Manual page 32

1508i(RM-430)
Baseband Description and Troubleshooting
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 the CPU.
USB Interface Disabled Troubleshooting
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