Acer Aspire S7-391 Acer S7-391 Notebook Service Guide - Page 7

Reinstalling the M-SATA Board 3-60 Reinstalling the Hold Sensor Board 3-62 Reinstalling the RTC Battery 3-64 Reinstalling the Left and Right Speakers 3-65 Reinstalling the Battery Pack 3-67 Reinstalling the Lower Case 3-69 CHAPTER 4 Troubleshooting Introduction 4-3 General Information 4-3 Power On Issues 4-4 No Display Issues 4-5 LCD Failure 4-7 Keyboard Failure 4-8 Touchpad Failure 4-9 Internal Speaker Failure 4-10 Microphone Failure 4-12 USB Failure 4-13 WLAN Failure 4-14 Card Reader Failure 4-15 Thermal Unit Failure 4-16 Other Functions Failure 4-17 Intermittent Problems 4-18 Undetermined Problems 4-18 Error Codes 4-19 BIOS Beep Codes 4-20 POST Codes 4-25 Component Codes 4-25 Progress Codes 4-29 vii