2 Troubleshooting Procedures
2-48 [CONFIDENTIAL] dynabook PORTEGE A30-E/TECRA A30-G,-J/dynabook S Series Maintenance Manual (960-931)
Procedure 2 Connector Check and Replacement Check
Check 1 Make sure the external display is firmly connected to RGB port with the cable. If
the connection is loose, reconnect it firmly and repeat Procedure 1. If there is still
an error, go to Check 2.
Check 2 Check the setup condition of the external display and returns to Procedure 1.
As for the setting of the external display, refer to the instructions manual for the
TV. If the problem still exists, perform Check 3.
Check 3 Connect the USB Type-C adapter to another USB connector on the PC and returns
to Procedure 1. If the problem still exists, perform Check 4.
Check 4 The external display may be damaged. Replace it with a new one and repeat
Procedure 1. If the problem still exists, perform Check 5.
Check 5 USB Type-C adapter may be damaged. Replace it with a new one. If the problem
still exists, check the PC condition.
2.20.2 USB Type-C port (power delivery charging)
To check if the USB Type-C port is malfunctioning or not, follow the troubleshooting
procedures below as instructed.
Procedure 1: Connection Check
Procedure 2: Replacement Check
Procedure 1 Connection Check
Check if the USB Type-C port charges the power with an AC adapter (USB-PD type). How to
connect the AC adapter and the USB Type-C adapter is as follows.
1. Connect the power cord to the AC adapter (USB-PD type). Then connect it to the USB
Type-C connector (power delivery charging) on the USB type-C adapter.
2. Plug the power cord into a live wall outlet.
3. Connect the USB Type-C adapter to the USB Type-C connector on the PC.
4. Make sure that the DC IN/battery LED glows.
If the DC IN/battery LED glows, power delivery function is working.
If the DC IN/battery LED doesn’t glow, make sure that the power cord, USB Type-C adapter
and PC are connected firmly each other. If connection is loose, reconnect it firmly and return
to Procedure 1. If the problem still occurs, perform Procedure 2.
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