Acer Aspire 4750Z Acer Aspire 4350, 4750, 4750G, 4750Z Service Guide - Page 98

Power-Related Symptoms Symptom / Error The system doesn't power-off. Battery can't be charged Action in Sequence Power source (battery pack and power adapter). See "Power System Check" on page 79. Hold and press the power switch for more than 4 seconds. System board See "Check the Battery Pack" on page 80. Battery pack System board PCMCIA-Related Symptoms Symptom / Error System cannot detect the PC Card (PCMCIA) PCMCIA slot pin is damaged. Action in Sequence PCMCIA slot assembly System board PCMCIA slot assembly Memory-Related Symptoms Symptom / Error Action in Sequence Memory count (size) appears different from actual size. Enter BIOS Setup Utility to execute "Load Default Settings, then reboot system. DIMM System board Speaker-Related Symptoms Symptom / Error In Windows, multimedia programs, no sound comes from the computer. Internal speakers make noise or emit no sound. Audio driver Speaker System board Speaker System board Action in Sequence Power Management-Related Symptoms Symptom / Error Action in Sequence The system will not enter hibernation See "Save to Disk (S4)" on page 17. Keyboard (if control is from the keyboard) Hard disk drive System board The system doesn't enter hibernation mode Press Fn+o and see if the computer enters hibernation and four short beeps every minute. mode. Touchpad Keyboard Hard disk connection board Hard disk drive System board The system doesn't enter standby mode after closing the LCD See "Save to Disk (S4)" on page 17. LCD cover switch System board 90 Chapter 4