Acer Aspire 3100 Service Guide

82Chapter 4
The system does not 
enter standby mode after 
closing the LCD.LCD cover switch
System board
The system does not 
resume from hibernation 
mode.Hard disk connection board
Hard disk drive
System board
The system does not 
resume from standby 
mode after opening the 
LCD.LCD cover switch
System board
Battery fuel gauge in 
Windows does not go 
higher than 90%. Remove battery pack and let it cool for two hours.
Refresh battery (continue to use battery until power off, then 
charge battery)....

Chapter 483
NOTE: If you can not correct the problems according to the anterior tables, see Undetermined Problems. Touchpad does not work. Reconnect touchpad cable.
Touchpad board
System board
Modem-Related Symptoms
Symptom/ErrorAction in Sequence
Internal modem does not 
work correctly.Modem phone port
modem combo board
System board
Keyboard/Touchpad-Related Symptoms
Symptom/ErrorAction in Sequence 

84Chapter 4
Intermittent Problems
Intermittent system hang problems can be caused by a variety of reasons that have nothing to do 
with a hardware defect, such as cosmic radiation, electrostatic discharge, or software errors. FRU 
replacement should be considered only when a recurring problem exists.
When analyzing an intermittent problems, follow the procedures below:
1.Run the advanced diagnostic test for the system board in loop mode at least 10 times.
2.If no error is detected, do not replace any...

Chapter 485
Undetermined Problems
The diagnostic problems does not identify which devices fail, which devices are incorrectly 
installed, whether a short circuit happens, or whether the system is inoperative.
NOTE: Verify if all devices attached are supported by the computer.
NOTE: Verify if the power supply used at the time of failure is operating correctly. You can refer to “Power 
System Check”.
Follow the procedures below to isolate the failing FRU. Do not isolate non-defective FRU.
1.Power off the...

Chapter 586
Main Board
Top Side
Jumper and Connector Location
Chapter 5 

87Chapter 5
#ItemDescription#ItemDescription
1 JP1 LCD PANEL CONNECTOR 2 JP2 LED BOARD CONNECTOR
3 JP3 MDC CONNECTOR 4 JP5 MEDIA BOARD CONNECTOR
5 JP6 TOUCH PAD BOARD 
CONNECTOR6 JP7 INTERNAL KEYBOARD 
CONNECTOR
7 JP9 PCMCIA SOCKET 8 JP12 INTERNAL SPEAKER 
CONNECTOR
9 JP13 INTERNAL MIC CONNECTOR 10 U12 LAN CHIP
11 U14 1349 CHIP 12 U17 BIOS FLASH ROM
13 U18 SOUTH BRIDGE CHIP 14 U25 SUPER I/O
15 U27 EC/KBC CHIP 16 U30 CARD BUS CONTROLLER
17 U33 AUDIO CODEC 

Chapter 588
Bottom Side
#ItemDescription#ItemDescription
1 JP14 USB CONNECTOR 2 JP15 CRT CONNECTOR
3 JP16 TV-OUT CONNECTOR 4 JP17 MINI CARD CONNECTOR
5 JP18 DDRII SODIMM SLOT 6 JP19 DDRII SODIMM SLOT
7 JP20 FAN CONNECTOR 8 JP21 USB CONNECTOR
9 JP22 RJ45 CONNECTOR 10 JP23 CPU SOCKET
11 JP24 ODD CONNECTOR 12 JP25 5-in-1 CONNECTOR
13 JP27 HDD (PATA) CONNECTOR 14 JP28 MINI PCI SLOT
15 JP30 NEW CARD SOCKET 16 JP31 BLUETOOTH CONNECTOR
17 JP32 SPDIF OUT JACK 18 JP33 LINE-IN JACK 

89Chapter 5
19 JP34 MIC JACK 20 PJP1 DC JACK
21 PJP2 BATTERY PACK CONNECTOR 22 U39 NORTH BRIDGE
#ItemDescription#ItemDescription 

Chapter 590
Switch Board
Top Side
ItemDescription
SW1 POWER BUTTON
SW2 E-MAIL BUTTON
SW3 INTERNAL BUTTON
SW4 USER BUTTON
SW5 EMPOWER BUTTON
D1 POWER LED
D2 MEDIA LED
D3 CAPS LED
D4 NUMLK LED
D5 EMAIL LED 

91Chapter 5
Bottom Side
ItemDescription
JP2 USB CONNECTOR
JP3 USB CONNECTOR
JP7 LED BOARD 
CONNECTOR