dynabook Portege X30L-K Series, Руководство по обслуживанию

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Maintenance Manual (960-948) 2-13
Troubleshooting Procedures
Check 1
Make sure USB unit is firmly connected to USB port. If the connection is
loose, connect firmly and repeat Procedure 1. If the problem still occurs, go
to Check 2
Check 2
Connect USB unit to other USB port and check if it works properly. If it does
not work properly, perform Check 3
Check 3
USB unit may be faulty. Replace it with a new one. If the problem still
occurs, perform Check 4
Check 4
System board may be faulty. Replace it with a new one following the steps
in Chapter 4, Replacement Procedures .
2.6 SSD Troubleshooting
To check if the M.2 SSD is malfunctioning or not, follow the troubleshooting
procedures below as instructed.
Procedure 1: Diagnostic Test Program Execution Check
Procedure 2: Connector Check and Replacement Check
USB unit <System board>
CN4800
CN4821
Type-C connector 1
Type-C connector 2
CN4850
Type-A connector 1
When checking the connection, be sure to check it with care for the
followings.
1. USB unit can not be disconnected from the connector.
2. USB unit is connected straight to the connector.
3. USB unit is connected all the way seated in the connector.
4. USB unit or connector can not be broken.
The contents of the hard disk/SSD will be erased when the hard disk/SSD
troubleshooting procedures are executed. Save the required contents of
the hard disk/SSD to other storage drive in advance. For the backup, refer
to the User’s Manual.