Acer Extensa 4220 TravelMate 4320/4720 and Extensa 4220/4620 Service Guide - Page 115

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 95. Hold and press the power switch for more than 4 seconds. Mainboard See "Check the Battery Pack" on page 95. Battery pack Mainboard PCMCIA-Related Symptoms Symptom / Error System cannot detect the PC Card (PCMCIA) PCMCIA slot pin is damaged. Action in Sequence PCMCIA slot assembly Mainboard 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 Mainboard 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 Mainboard Speaker Mainboard 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 44. Keyboard (if control is from the keyboard) Hard disk drive Mainboard The system doesn't enter hibernation mode Press Fn+o and see if the computer enters hibernation mode. and four short beeps every minute. Touchpad Keyboard Hard disk connection board Hard disk drive Mainboard The system doesn't enter standby mode after closing the LCD See "Save to Disk (S4)" on page 44. LCD cover switch Mainboard Chapter 4 105