Acer Travelmate 2400 Service Guide

64Chapter 4
23DEBUG_POST_TEST_BATT_CMOS_
SUMTest Battery Fail & check CMOS X-SUM
24DEBUG_HWIO_TEST_DMA_CTLRSUse DMA to copy data for Test the DMA 
controllers
25DEBUG_HWIO_INIT_8237Initialize 8237A Controller
26DEBUG_POST_INIT_VECSInstall and Initialize interrupt Vectors
27DEBUG_RAM_QUICK_SIZEEnter memory protect mode, use change RAM 
bank to do RAM Quick Sizing
28DEBUG_RAM_PROT_ENTRY_1Memory protected mode entered safely
29DEBUG_RAM_SIZE_DONETest the basic 640k ram , RAM test completed...

Chapter 465
44DEBUG_OEM_INIT_POWER_MANCheck special device initial power management 
function
45DEBUG_KEYB_SET_LEDS_2Clear keyboard buffer and Update NUMLOCK 
status
46DEBUG_HWIO_FIND_80X87Test For Coprocessor Installed, and enable 
coprocessor interrupt
47DEBUG_OEM_LAST_MINUTE_INITRun OEM functions before boot, and enable 
L1,L2 cache
48DEBUG_MISC_LAUNCH_INT19Post code will finish, ready to run int19 and load 
OS
49DEBUG_BEGIN_BOOT_CODEInto Int19, to boot from floppy or other boot 
device...

66Chapter 4
E6DEBUG_RET_PCI_2PCI device config finish
E7DEBUG_BRIDGE_HUNTSearch for PCI bridge controllor device
E8DEBUG_PCI_IDE_FINDSearch IDE controllors on the PCI bus, and 
config the IDE controllors
E9DEBUG_CB_CONFIGstart of cardbus config
PNP BIOS  --  PNPINIT.ASM
A1DEBUG_PNP_ENABLE_VERIFY_RT
DATAEnable and Verify R/W Status for PNP BIOS 
Runtime Data Area
A2DEBUG_PNP_GET_VERIFY_NVRAMGet and Verify R/W Status for PNP BIOS 
NVRAM data area
A3DEBUG_PNP_SYSTEM_NODESResolve System Nodes with the CMOS...

Chapter 467
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....

68Chapter 4
Battery can’t be charged or discharged See “Check the Battery Pack” on page 60. 
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...

Chapter 469
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...

70Chapter 4
NOTE: If you cannot find a symptom or an error in this list and the problem remains, see “Undetermined 
Problems” on page 72. 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 

Chapter 471
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...

72Chapter 4
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” on...

Chapter 573
Top View
 
SW3 Power Switch SW1 Lid Swtich
JP1 Bluetooth Connector JP5 Touchpad Connector
SW2 E-mail Switch JP4 Keyboard Connector
SW4 Internet Browser Switch JP42 Speaker Connector
SW5 Emanager Switch JP7 PCMCIA Slot
SW6 User Programmable Switch JP10 Microphone Connector
2
JP1
2
JP42
JP5
2
KQ:
JP1022
JP42
2
JP7
2
2
SW1 SW2
SW3SW4
SW5
SW6
Jumper and Connector Locations
Chapter 5