Samsung i780 Service Manual page 25

How to deal with the an error in the computer USB port of the computer.
Symptom: Device is not identified after connecting it.
Cause: The device is connected before the previous connection is complete. All devices should be
connected one by one. Otherwise, an error may occur in the computer USB port of the computer.
Solution:
Proceed with the following action in order only when the previous action does not work.
1) Unplug the USB port from the computer and plug it again.
2) Open the Device Manager and remove the USB hub and install it again.
3) Reboot the computer.
4. Trouble Shooting
1. "PDA Device not found" message
Make sure that check box, Allow USB connection at the Connection Settings, is
released. (ActiveSync)
2. "Port Open Failed" message or application hang
After you install "phone USB driver (Samsung CDMA Modem)" at first time, you may see "Port
open failed..." message or application hang( Opening COM XX succeed...) while downloading a
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