Acer Aspire 4750Z Acer Aspire 4350, 4750, 4750G, 4750Z Service Guide - Page 99

Power Management-Related Symptoms Symptom / Error The system doesn't resume from hibernation mode. 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 See "Save to Disk (S4)" on page 17. Hard disk connection board Hard disk drive System board See "Save to Disk (S4)" on page 17. LCD cover switch System board Remove battery pack and let it cool for 2 hours. Refresh battery (continue use battery until power off, then charge battery). Battery pack System board 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. 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 System board System board Onboard Devices Configuration Run printer self-test. Printer driver Printer cable Printer System Board Device driver Device cable Device System board Keyboard/Touchpad-Related Symptoms Symptom / Error Keyboard (one or more keys) does not work. Touchpad does not work. Action in Sequence Reconnect the keyboard cable. Keyboard System board Reconnect touchpad cable. Touchpad board System board Chapter 4 91