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Chapter 4
The system doesn’t power-off.
Power source (battery pack and power adapter). See “Power
System Check” on page 107.
Hold and press the power switch for more than 4 seconds.
System board
Battery can’t be charged
See “Check the Battery Pack” on page 109.
Battery pack
System board
PCMCIA-Related Symptoms
Symptom / Error
Action in Sequence
System cannot detect the PC Card
(PCMCIA)
PCMCIA slot assembly
System board
PCMCIA slot pin is damaged.
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
Action in Sequence
In Windows, multimedia programs, no
sound comes from the computer.
Audio driver
Speaker
System board
Internal speakers make noise or emit no
sound.
Speaker
System board
Power Management-Related Symptoms
Symptom / Error
Action in Sequence
The system will not enter hibernation
See “Save to Disk (S4)” on page 39.
Keyboard (if control is from the keyboard)
Hard disk drive
System board
The system doesn't enter hibernation mode
and four short beeps every minute.
Press Fn+
o
and see if the computer enters hibernation 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 39.
LCD cover switch
System board
Power-Related Symptoms
Symptom / Error
Action in Sequence
SG_Tangiz.book Page 120 Tuesday, July 10, 2007 11:01 AM
Summary of Contents for 7720
Page 6: ...VI ...
Page 10: ...X Table of Contents ...
Page 50: ...40 Chapter 1 ...
Page 67: ...Chapter 2 57 ...
Page 68: ...58 Chapter 2 ...
Page 114: ...104 Chapter 3 ...
Page 128: ...118 Chapter 4 F5h Boot to Mini DOS F6h Clear Huge Segment F7h Boot to Full DOS Code Beeps ...
Page 172: ...Appendix A 162 ...
Page 178: ...168 Appendix C ...