Acer Aspire 1450 Service Guide

Chapter 463
TNumeric keypad
TExternal keyboard
If any of these devices do not work, reconnect the cable connector and repeat the failing operation. 
Memory check
Memory errors might stop system operations, show error messages on the screen, or hang the system.
1.Boot from the diagnostics diskette and start the doagmpstotics program (please refer to main board.
2.Go to the diagnostic memory in the test items.
3.Press F2 in the test items.
4.Follow the instructions in the message window.
NOTE: Make sure...

64Chapter 4
Check the Battery Pack
To check the battery pack, do the following:
From Software:
1.Check out the Power Management in control Panel
2.In Power Meter, confirm that if the parameters shown in the screen for Current Power Source and Total 
Battery Power Remaining are correct.
3.Repeat the steps 1 and 2, for both battery and adapter.
4.This helps you identify first the problem is on recharging or discharging.
From Hardware:
1.Power off the computer. 
2.Remove the battery pack and measure the...

Chapter 465
Power-On Self-Test (POST) Error Message
The POST error message index lists the error message and their possible causes. The most likely cause is 
listed first.
NOTE: Perform the FRU replacement or actions in the sequence shown in FRU/Action column, if the FRU 
replacement does not solve the problem, put the original part back in the computer. Do not replace a 
non-defective FRU.
This index can also help you determine the next possible FRU to be replaced when servicing a computer.
If the...

66Chapter 4
Index of Error Messages
Error Message List
Error MessagesFRU/Action in Sequence
Struck Key See ““Keyboard or Auxiliary Input Device Check” on page 62
System CMOS checksum bad - Default 
configuration usedRTC battery
Run BIOS Setup Utility to reconfigure system, then reboot system.
Real time clock error RTC battery
Run BIOS Setup Utility to reconfigure system time, then reboot 
system.
Main board
Previous boot incomplete - Default configuration 
used“Load Default Settings” in BIOS Setup...

Chapter 467
Error Message List
No beep Error MessagesFRU/Action in Sequence
Power-on indicator turns off and LCD is blank. Power source (battery pack and power adapter.) See “Power 
System Check” on page 63
Ensure every connector is connected tightly and correctly.
Reconnect the DIMM.
Main board.
Power-on indicator turns on and LCD is blank. Power source (battery pack and power adapter.) See “Power 
System Check” on page 63
Reconnect the LCD connector
Hard disk drive
LCD cable
LCD inverter
LCD
Main...

68Chapter 4
POST Codes
CodeBeepsPOST Routine Description
02h Verify Real Mode
03h Disable Non-Maskable Interrupt (NMI)
04h Get CPU type
06h Initialize system hardware
08h Initialize chipset with initial POST values
09h Set IN POST flag
0Ah Initialize CPU registers
0Bh Enable CPU cache
0Ch Initialize caches to initial POST values
0Eh Initialize I/O component
0Fh Initialize the local bus IDE
10h Initialize Power Management
11h Load alternate registers with initial POST 
values
12h Restore CPU control word...

Chapter 469
46h 2-1-2-3 Check ROM copyright notice
48h Check video configuration against CMOS
49h Initialize PCI bus and devices
4Ah Initialize all video adapters in system
4Bh QuietBoot start (optional)
4Ch Shadow video BIOS ROM
4Eh Display BIOS copyright notice
50h Display CPU type and speed
51h Initialize EISA board
52h Test keyboard
54h Set key click if enabled
58h 2-2-3-1 Test for unexpected interrupts
59h Initialize POST display service
5Ah Display prompt “Press F2 to enter SETUP”
5Bh Disable CPU...

70Chapter 4
8Ch Initialize floppy controller
8Fh Determine number of ATA drives (optional)
90h Initialize hard-disk controllers
91h Initialize local-bus hard-disk controllers
92h Jump to UserPatch2
93h Build MPTABLE for multi-processor boards
95h Install CD ROM for boot
96h Clear huge ES segment register
97h Fixup Multi Processor table
98h 1-2 Search for option ROMs. One long, two short 
beeps on checksum failure.
99h Check for SMART drive (optional)
9Ah Shadow option ROMs
9Ch Set up Power Management
9Dh...

Chapter 471
D2h Unknown interrupt
CodeBeepsFor Boot Block in Flash ROM
E0h Initialize the chipset
E1h Initialize the bridge
E2h Initialize the CPU
E3h Initialize the system timer
E4h Initialize system I/O
E5h Check force recovery boot
E6h Checksum BIOS ROM
E7h Go to BIOS
E8h Set Huge Segment
E9h Initialize Multi Processor
EAh Initialize OEM special code
EBh Initialize PIC and DMA
ECh Initialize Memory type
EDh Initialize Memory size
EEh Shadow Boot Block
EFh System memory test
F0h Initialize interrupt...

72Chapter 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....