2 Troubleshooting Procedures
2-30 [CONFIDENTIAL] dynabook PORTEGE A30-E/TECRA A30-G,-J/dynabook S Series Maintenance Manual (960-931)
Check 4 USB FPC may be faulty. Replace it with a new one. If the problem still occurs,
perform Check 5.
Check 5 USB board/LTE board may be faulty. Replace it with a new one. If the problem
still occurs, perform Check 6.
Check 6 USB board/LTE board or USB FPC may be faulty. Replace it with a new one. If
the problem still occurs, perform Check 7.
Check 7 System board may be faulty. Replace it with a new one following the instruction in
Chapter 4, Replacement Procedure.
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