Acer Aspire 5820T Service Guide - Page 165

USB Failure (Right up/down side) If the rightside USB port fails, perform the following actions one at a time to correct the problem. Do not replace non-defective FRUs: Start OK Check USB/B to M/B cable OK Check USB/B Re-assemble the NG USB/B cable to M/B OK Swap USB/B and NG USB cable Swap M/B Other Failures If the VGA board, LAN Port, external MIC or Speakers, PCI Express Card, 5-in-1 Card Reader or Volume Wheel fail, perform the following general steps to correct the problem. Do not replace non-defective FRUs: 1. Check whether the drive is OK. 2. Verify that the Test Fixture is OK. 3. Swap the mainboard and retest. Chapter 4 155