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Chapter 4 94
Battery can’t be charged or discharged See “Check the Battery Pack” on page 85.
Battery pack
Main board
System hang during POST ODD/HDD/FDD/RAM module
Main board
PCMCIA-Related Symptoms
Symptom / Error Action in Sequence
System cannot detect the PC Card (PCMCIA) PCMCIA slot assembly
Main board
PCMCIA slot pin is damaged. PCMCIA slot assembly
PC Card cannot be inserted or ejected Check if the PCMCIA slot is blocked
Main board
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.
RAM module
Main board
Check BIOS revision
System can power on, but you hear two long
beeps: “B--, B--” and the LCD is blank.
Reinsert DIMM
DIMM
Main board
Speaker-Related Symptoms
Symptom / Error Action in Sequence
In Windows, multimedia programs, no sound
comes from the computer.
OS volume control
Audio driver
Speaker
Main board
Internal speakers make noise or emit no sound. Speaker
Main board
Microphone cannot work Audio driver
Volume control in Windows XP
Main board
Power Management-Related Symptoms
Symptom / Error Action in Sequence
The system will not enter hibernation mode Power option in Windows XP
Hard disk drive
Main board
The system doesn’t enter standby mode after
closing the lid of the portable computer.
Driver of Power Option Properties
Lid close switch in upper case
Main board
Power-Related Symptoms
Symptom / Error Action in Sequence