Acer TravelMate 520 TravelMate 520 Service Guide - Page 82

Power Management-Related Symptoms Symptom / Error The system doesn't resume from standby mode after opening the LCD. Battery fuel gauge in Windows doesn't go higher than 90%. System hangs intermittently. Action in Sequence Standby Mode LCD cover switch System board Remove battery pack and let it cool for 2 hours. Refresh battery (continue to use battery until power off, then charge battery). Battery pack Charger board System board Set Thermal Sensor Threshold. Reconnect hard disk/CD-ROM drives. Hard disk connection board System board Peripheral-Related Symptoms Symptom / Error System configuration does not match the installed devices. External display does not work correctly. USB does not work correctly. Print problems. Serial or parallel port device problems. Keyboard/Touchpad-Related Symptoms Symptom / Error Keyboard (one or more keys) does not work. Touchpad does not work. Action in Sequence Enter BIOS Setup Utility to execute "Load Default Settings", then reboot system. Reconnect hard disk/CD-ROM/diskette drives. Press Fn+F5, LCD/CRT/Both display switching Running PQA Diagnostics Program. System board System Diagnostics Diskette System board Ensure that the "Parallel Port" in the "Onboard Devices Configuration" of BIOS Setup Utility is set to Enabled. Onboard Devices Configuration Run printer self-test. Printer driver Printer cable Printer System Board Ensure that the "Serial Port" in the "Onboard Devices Configuration" of BIOS Setup Utility is set to Enabled. Device driver Device cable Device System board Action in Sequence Reconnect the keyboard cable. Keyboard System board Reconnect touchpad cable. Touchpad board System board 76 Chapter 4