Nokia 1508 Manual page 27

1508(RM-388)
Baseband Description and Troubleshooting
Checking Series
1. Check if the bottom insert of the mobile phone is well connected.
2. Check if the COM of the computer is well connected.
And confirm the configuration of the COM setting.
3. Check the welding of the mobile phone connection, whether there is foreign
impurity or not.
4. Check if the Rx, TX, DTR and etc. are shortcircuited to the ground.
5. Check the welding of CPU.
Issue 1
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