Acer TravelMate 5720 Series Service Manual page 126

Power-Related Symptoms
Symptom / Error
The system doesn't power-off.
Battery can't be charged
PCMCIA-Related Symptoms
Symptom / Error
System cannot detect the PC Card
(PCMCIA)
PCMCIA slot pin is damaged.
Memory-Related Symptoms
Symptom / Error
Memory count (size) appears different from
actual size.
Speaker-Related Symptoms
Symptom / Error
In Windows, multimedia programs, no
sound comes from the computer.
Internal speakers make noise or emit no
sound.
Power Management-Related Symptoms
Symptom / Error
The system will not enter hibernation
The system doesn't enter hibernation mode
and four short beeps every minute.
The system doesn't enter standby mode
after closing the LCD
116
Action in Sequence
Power source (battery pack and power adapter). See "Power
System Check" on page 103.
Hold and press the power switch for more than 4 seconds.
System board
See "Check the Battery Pack" on page 105.
Battery pack
System board
Action in Sequence
PCMCIA slot assembly
System board
PCMCIA slot assembly
Action in Sequence
Enter BIOS Setup Utility to execute "Load Default Settings,
then reboot system.
DIMM
System board
Action in Sequence
Audio driver
Speaker
System board
Speaker
System board
Action in Sequence
See "Save to Disk (S4)" on page 38.
Keyboard (if control is from the keyboard)
Hard disk drive
System board
o
Press Fn+ and see if the computer enters hibernation mode.
Touchpad
Keyboard
Hard disk connection board
Hard disk drive
System board
See "Save to Disk (S4)" on page 38.
LCD cover switch
System board
Chapter 4