Acer Aspire 4715Z Aspire 4315 / 4715Z Service Guide - Page 108

Index of Symptom-to-FRU Error Message LCD-Related Symptoms Symptom / Error LCD backlight doesn't work LCD is too dark LCD brightness cannot be adjusted LCD contrast cannot be adjusted Unreadable LCD screen Missing pels in characters Abnormal screen Wrong color displayed LCD has extra horizontal or vertical lines displayed. Check or do the following in sequence T Run "Load Setup Defaults" in BIOS Setup Utility, then reboot system. T Reconnect the LCD connectors. T Keyboard (if contrast and brightness function key doesn't work). T LCD inverter ID T LCD cable T LCD inverter board T LCD T Mainboard T Reconnect the LCD connector T LCD inverter ID T LCD cable T LCD inverter board T LCD T Mainboard T LCD inverter ID T LCD inverter board T LCD cable T LCD T Mainboard Indicator-Related Symptoms Symptom / Error Indicator incorrectly remains off or on, but system runs correctly Check or do the following in sequence T Reconnect the LCD inverter board. T Mainboard Power-Related Symptoms Symptom / Error Power shuts down during operation The system doesn't power-on. Check or do the following in sequence T Power source (battery pack and power adapter). See "Power System Check" on page 89. T Battery pack T Power adapter T Hard disk drive & battery connection board T Mainboard T Power source (battery pack and power adapter). See "Power System Check" on page 89. T Battery pack T Power adapter T Hard disk drive & battery connection board T Mainboard 98 Chapter 4