Sony VGN-AX570G - Manual (Page 217)

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Troubleshooting
Multi Function Bay Docking Station
Why can't I use the devices connected to the multi function bay docking station?
Make sure to use the AC adapter supplied with the multi function bay docking station to connect the docking station to a power
source. The multi function bay docking station does not work on the battery installed in the computer.
Why can't I use the device connected to the printer port?
The printer port on the multi function bay docking station is internally connected to the USB and should be used for a
printer only.