Acer Travelmate 4270 Service Guide

104Chapter 4
Index of Symptom-to-FRU Error Message
LCD-Related Symptoms
Symptom / ErrorAction in Sequence
LCD backlight doesnt work First, plug a monitor to CRT port. Next, enter BIOS utility to running 
“Load Default Settings” then reboot the system.
Reconnect the LCD connectors.
Keyboard (if the brightness function key doesnt work).
LCD cable
LCD inverter
LCD
Main board
LCD is too dark
LCD brightness cannot be adjustedEnter BIOS Utility to execute “Load Setup Default Settings”, then 
reboot system....

Chapter 4105
Battery can’t be charged or discharged See “Check the Battery Pack” on page 96. 
Battery pack
Main board
System hang during POST ODD/HDD/FDD/RAM module
Main board
PCMCIA-Related Symptoms
Symptom / ErrorAction 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 / ErrorAction in Sequence
Memory...

106Chapter 4
The system doesnt resume from hibernation/ 
standby mode.Connect AC adapter then check if the system resumes from 
Standby/Hibernation mode. 
Check if the battery is low.
Hard disk drive
Main board
The system doesnt resume from standby mode 
after opening the lid of the portable computer.LCD cover switch
Main board
Battery fuel gauge in Windows doesn’t go higher 
than 90%. Refresh battery (continue use battery until power off, then charge 
battery).
Battery pack
Main board
System hangs...

Chapter 4107
NOTE: If you cannot find a symptom or an error in this list and the problem remains, see “Undetermined 
Problems” on page 109. Modem/LAN-Related Symptoms
Symptom / ErrorAction in Sequence
Internal modem does not work correctly. Phone cable
Driver
Reconnect the Internal modem cable to the main board tightly.
Main board
Internal LAN does not work correctly Lan cable
Driver
Main board 

108Chapter 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 problem, do the following:
1.Run the diagnostic test for the system board in loop mode at least 10 times.
2.If no error is detected, do not replace any FRU.
3.If any error is...

Chapter 4109
Undetermined Problems
The diagnostic problems does not identify which adapter or device failed, which installed devices are incorrect, 
whether a short circuit is suspected, or whether the system is inoperative.  
Follow these procedures to isolate the failing FRU (do not isolate non-defective FRU).
NOTE: Verify that all attached devices are supported by the computer.
NOTE: Verify that the power supply being used at the time of the failure is operating correctly. (See “Power 
System Check”...

Chapter 511 0
Top View
ItemDescriptionItemDescription
CN18 RJ45 connector CN19 DVI connector
CN20 Docking connector PJ4 DC wire connector
DO29DO2:DO31
QK5
DO32
DO34
DO35
DO36
DO3:
V45
DO43
DO45
DO52
DO47
DO48
DO28
DO53
DO44
DO41
DO39
DO35
DO37
DO33
V55
V45
V41
V44
V44
V54
V5:
TX:TX21
DO49
V35
Jumper and Connector Locations
Chapter 5 

111Chapter 5
CN21 Mini card connector CN23 Main battery connector
CN24 ODD fix connector CN25 ODD media connector
CN29 Sub-battery/HDD connector CN27 Mini PCI connector
CN32 CIR wire connector CN34 Bluetooth wire connector
CN41 PATA HDD connector CN41 SATA HDD connector
CN36 DDR connector CN37 DDR connector
CN39 2nd fan connector CN42 Mini 1394 connector
CN38 PCMCIA connector CN33 USB connector
CN30 USB connector CN28 S-Video connector
CN26 Main fan connector CN24 CPU socket
CN22 CRT connector U44 CPU...

Chapter 511 2
Bottom View
 
ItemDescriptionItemDescription
CN5 LID wire connector CN6 LCD wire connector
CN7 CCD wire connector CN29 Express card connector
CN15 3 in 1 connector CN13 USB FFC connector
CN12 MDC connector CN10 Touchpad board FFC connector
CN9 MIC wire connector CN8 Keyboard connector
U6 VGA RAM U10 VGA RAM
U9 EC U7 BIOS ROM
SW6 Quick switch SW7 Quick switch
SW8 IE switch SW4 E-mail switch
SW5 Power switch
DO6DO7
DO8
DO3:
DO26
DO24
DO23
DO21
DO:DO9
TX7TX8TX9TX5
TX6
V7
V21
V:V8 

Chapter 611 3
This chapter gives you the FRU (Field Replaceable Unit) listing in global configurations of Aspire 5670
 Refer to this chapter whenever ordering for parts to repair or for RMA (Return Merchandise Authorization).
 Please also note that there are some common parts for Aspire 5620, TravelMate 4210/4270/4670
Please note that WHEN ORDERING FRU PARTS, you should check the most up-to-date information
available on your regional web or channel. For whatever reasons a part number change is made, it...