Acer Aspire 3300s Service Guide

							65Chapter 4
23h 1. Check validity of RTC value:
    e.g. a value of 5Ah is an invalid value for RTC minute.
2. Load CMOS settings into BIOS stack. If CMOS checksum fails, use default value  
    instead.
3. Prepare BIOS resource map for PCI & PnP use. If ESCD is valid, take into
    consideration of the ESCD’s legacy information.
4. Onboard clock generator initialization. Disable respective clock resource to empty PCI
    & DIMM slots.
5. Early PCI initialization
       -Enumerate PCI bus number
       -Assign memory & I/O resource
       -Search for a valid VGA device and VGA BIOS, and put it into C000:0
24h Reserved
25h Reserved
26h Reserved
27h Initialize INT 09 buffer
28h Reserved
29h 1. Program CPU internal MTRR (P6 & PII) for 0-640K memory address.
2. Initialize the APIC for Pentium class CPU.
3. Program early chipset according to CMOS setup. Example: onboard IDE controller.
4. Measure CPU speed.
5. Invoke video BIOS.
2Ah Reserved
2Bh Reserved
2Ch Reserved
2Dh 1. Initialize multi-language
2. Put information on screen display, including Award title, CPU type, CPU speed...
2Eh Reserved
2Fh Reserved
30h Reserved
31h Reserved
32h Reserved
33h Reset keyboard except Winbond 977 series Super I/O chips.
34h Reserved
35h Reserved
36h Reserved
37h Reserved
38h Reserved
39h Reserved
3Ah Reserved
3Bh Reserved
3Ch Test 8254.
3Dh Reserved
3Eh Test 8259 interrupt mask bits for channel 1
3Fh Reserved
40h Test 8259 interrupt mask bits for channel 2.
41h Reserved
42h Reserved
CheckpointDescription 
						

							Chapter 466
43h Test 8259 functionality
44h Reserved
45h Reserved
46h Reserved
47h Initialize EISA slot
48h Reserved
49h 1. Calculate total memory by testing the last double word of each 64K page.
2. Program writes allocation for AMD K5 CPU.
4Ah Reserved
4Bh Reserved
4Ch Reserved
4Dh Reserved
4Eh 1. Program MTRR of M1 CPU.
2. Initialize L2 cache for P6 class CPU & program CPU with proper cacheable range.
3. Initialize the APIC for P6 class CPU.
4. On MP platform, adjust the cacheable range to smaller one in case the cacheable
    ranges between each CPU are not identical.
4Fh Reserved
50h Initialize USB
51h Reserved
52h Test all memory (clear all extended memory to 0)
53h Reserved
54h Reserved
55h Display number of processors (multi-processor platform)
56h Reserved
57h 1. Display PnP logo
2. Early ISA PnP initialization
    -Assign CSN to every ISA PnP device.
58h Reserved
59h Initialize the combined Trend Anti-Virus code.
5Ah Reserved
5Bh (Optional Feature)
Show message for entering AWDFLASH.EXE from FDD (optional)
5Ch Reserved
5Dh 1. Initialize Init_Onboard_Super_IO switch.
2. Initialize Init_Onboard_AUDIO switch.
5Eh Reserved
5Fh Reserved
60h Okay to enter Setup utility; i.e. not until this POST stage can users enter the CMOS setup 
utility.
61h Reserved
62h Reserved
63h Reserved
64h Reserved
65h Initialize PS/2 Mouse
66h Reserved
CheckpointDescription 
						

							67Chapter 4
67h Prepare memory size information for function call:
INT 15h ax=E820h
68h Reserved
69h Turn on L2 cache
6Ah Reserved
6Bh Program chipset registers according to items described in Setup& Auto-configuration 
table.
6Ch Reserved
6Dh 1. Assign resources to all ISA PnP devices.
2. Auto assign ports to onboard COM ports if the corresponding item in Setup is set to
    “AUTO”
6Eh Reserved
6Fh 1. Initialize floppy controller
2. Set up floppy related fields in 40: hardware.
70h Reserved
71h Reserved
72h Reserved
73h (Optional Feature)
Enter AWDFLASH.EXE if:
       -AWDFLASH is found in floppy drive
       -ALT+F2 is pressed
74h Reserved
75h Detect & install all IDE devices: HDD, LS120, ZIP,CDROM.....
76h Reserved
77h Detect serial ports & parallel ports
78h Reserved
79h Reserved
7Ah Detect & install co-processor
7Bh Reserved
7Ch Reserved
7Dh Reserved
7Eh Reserved
7Fh 1. Switch back to text mode if full screen logo is supported.
    -If errors occur, report errors & wait for keys
    -If no errors occur or F1 key is pressed to continue:
   Clear EPA or customization logo.
80h Reserved
81h Reserved
82h 1. Call chipset power management hook.
2. Recover the text fond used by EPA logo (not for full screen logo)
3. If password is set, ask for password.
83h Save all data in stack back to CMOS.
84h Initialize ISA PnP boot devices.
CheckpointDescription 
						

							Chapter 468
85h 1. USB final Initialization
2. NET PC: Build SYSID structure
3. Switch screen back to text mode.
4. Set up ACPI table at top of memory.
5. Invoke ISA adapter ROMs.
6. Assign IRQs to PCI devices
7. Initialize APM
8. Clear noise of IRQs/
86h Reserved
87h Reserved
88h Reserved
89h Reserved
90h Reserved
91h Reserved
92h Reserved
93h Read HDD boot sector information for Trend Anti-Virus code
94h 1. Enable L2 cache
2. Program boot up speed
3. Chipset final initialization
4. Power management final initialization
5. Clear screen & display summary table
6. Program K6 write allocation
7 Program P6 class write combining .
95h 1. Program daylight saving
2. Update keyboard LED & typematic rate
96h 1. Build MP table 
2. Build & update ESCD
3. Set CMOS century to 20h or 19h
4. Load CMOS time into DOS timer tick
5. Build MSIRQ routing table
FFh Boot attempt (INT 19h)
CheckpointDescription 
						

							69Chapter 4
POST Error Messages List
If you cannot run the diagnostics program tests but did receive a POST error message, use “POST Error 
Messages List” to diagnose system problems. If you did not receive any error message, look for a description 
of your error symptoms in “Error Symptoms List” on page 71
.
NOTE: When you have deemed it necessary to replace an FRU, and have done so, you must run a total 
system check to ensure that no other activity has been affected by the change. This system check can 
be done through the diagnostics program.
NOTE: Check all power supply voltages, switch, and jumper settings before you replace the main board. Also 
check the power supply voltages if you have a “system no-power” condition. 
If you are unable to correct the problem by using the “BIOS Messages List” table and “Error Symptoms List” 
table, go to “Undetermined Problems” on page 75.
NOTE: To diagnose a problem, first find the BIOS error messages in the left column. If directed to a check 
procedure, replace the FRU indicated in the check procedure. If no check  procedure is indicated, the 
first Action/FRU listed in right column is the most likely cause.
BIOS MessagesAction/FRU
CMOS Battery Bad Battery should be replaced
CMOS Checksum Error Check the battery and replace if necessary.
Disk Boot Failure
Insert system disk into Drive (A:)and press 
e.If you 
assumed the system would boot from the hard drive, make 
sure the controller is inserted correctly and all cables are 
properly attached. Also be sure the disk is formatted as a 
boot device. Then reboot the system.
Diskette Drives or Types Mismatch Error Run Setup
Display Switch Is Set Incorrectly Determine which setting is correct, and then either turn off 
the system and change the jumper, or enter Setup and 
change the VIDEO selection.
Display Type Has Changed Since Last Boot Configure the system for the new display type/
Error Encountered Initializing Hard Drive Be sure the adapter is installed correctly and all cables are 
correctly and firmly attached. Also be sure the correct hard 
drive type is selected in Setup.
Error Encountered Initializing Hard Disk Controller Make sure the cord is correctly and firmly installed in the 
bus. Be sure the correct hard drive type is selected in 
Setup. Also check if any jumper needs to be set correctly 
on the hard drive.
Floppy Disk CNTRLR Error or No CNTRLR Present Make sure the controller is installed correctly and firmly. If 
there are no floppy drives installed, be sure the Diskette 
Drive selection in Setup is set to None.
Keyboard Error or No Keyboard Present Make sure the keyboard is attached correctly and no keys 
are pressed during the boot.
NOTE: If you are purposely configuring the 
system without a keyboard, set the error 
halt condition in Setup to HALT ON ALL, 
BUT KEYBOARD.This will cause BIOS to 
ignore the missing keyboard and continue 
the boot.
Memory Address Error Use this location along with the memory map for your 
system to find and replace the bad memory chips.
Memory Parity Error Use this location along with the memory map for your 
system to find and replace the bad memory chips.
Memory Size Has Changed Since Last Boot In EISA mode, use Configuration Utility to reconfigure the 
memory configuration.  In ISA mode, enter Setup and 
enter the new memory size in the memory fields. 
						

							Chapter 470
Memory Verify Error Use this location along with your system’s memory map to 
locate the bad chip.
Offending Address Not Found This message is used in conjunction with the I/O 
CHANNEL CHECK and RAM PARITY ERROR messages 
when the segment that has caused problem cannot be 
isolated.
Offending Segment This message is used in conjunction with the I/O 
CHANNEL CHECK and RAM PARITY ERROR messages 
when the segment that has caused problem cannot be 
isolated.
Press A Key To Reboot  Press any key and the system will reboot.
Press 
l to Disable NMI, m to RebootWhen the BIOS detects a Non-maskable Interrupt 
condition during boot, this will allow you to disable the NMI 
and continue to boot, or you can reboot the system with the 
NMI enabled.
RAM Parity Error Checking for segment
System Halted
Press 
b-a-c to reboot.
Or plug out AC and wait for 10 seconds, then plug in AC 
again. Press power button to boot the system again. .
Floppy Disk(s) Fail(80) Unable to reset floppy subsystem
Floppy Disk(s) Fail (40) Floppy Type mismatch
Hard Disk(s) Fail (80) HDD reset failed
Hard Disk(s) Fail (40) HDD controller diagnostics failed
Hard Disk(s) Fail (20) HDD initialization error
Hard Disk(s) Fail (10) Unable to recalibrate fixed disk
Hard Disk(s) Fail (08) Sector Verify failed
Keyboard Is Locked Out Unlock the key
Keyboard Error Or No Keyboard Present Make sure the keyboard is attached correctly and no keys 
are pressed during the boot.
Manufacturing POST loop System will repeat POST procedure infinitely while the P15 
of keyboard controller is pull low. This is also used for M/B 
burn in test.
BIOS ROM Checksum Error BIOS will boot from the boot block and read BIOS binary 
file from FDD disk, then flash BIOS ROM (FWH - Firmware 
Hub).
Memory Test Fail BIOS reports the memory test fail if the onboard memory is 
tested error
BIOS MessagesAction/FRU 
						

							71Chapter 4
Error Symptoms List 
NOTE: To diagnose a problem, first find the error symptom in the left column. If directed to a check procedure, 
 replace the FRU indicated in the check procedure. If no check procedure is indicated, the first Action/
 FRU listed in right column is the most likely cause.
Error SymptomAction/FRU
Processor / Processor Fan
NOTE: Normally, the processor fan should be operative, and the processor clock setting should be 
exactly set to match its speed requirement before diagnosing any processor problems.
Processor fan does not run but power supply 
fan runs.1.  Ensure the system is not in power saving mode. See “Power 
Management” in chapter 2. 
2.  With the system power on, measure the voltage of processor fan 
connector. Its reading should be +12Vdc. Its reading should be 
+12Vdc. If the reading shows normal, but the fan still does not 
work, then replace a good fan.
3.  Main board.
Processor test failed.1.  Processor.
2.  Main board.
Main board and Memory
NOTE: Ensure the memory modules are installed properly and the contact leads are clean before 
diagnosing any system problems. 
Memory test failed.  1.  See Memory 
2.  Main board
Incorrect memory size shown or repeated 
during POST.1.  Insert the memory modules in the DIMM sockets properly, then 
reboot the system. 
2.  Memory module. 
3.  Main board.
System works but fails to enter power saving 
mode when the Power Management Mode 
is set to Enabled.1.  Enter BIOS Setup and load default settings.
In Windows Systems, check settings in Power Management 
Property of Control Panel.
2.  Reload software from Recovery CD.
Blinking cursor only; system does not work. 1.  Diskette/IDE drive connection/cables
2.  Diskette/IDE disk drives
3.  See “Undetermined Problems”.
4.  Main board
Diskette Drive
NOTE: Ensure the diskette drive is auto-setting in BIOS Setup and its read/write head is clean before 
diagnosing any diskette drive problems.(If only one drive is installed, please make sure the 
drive is connected to master connector or the drive is set to master.)
Media and drive are mismatched. 1.  Ensure the diskette drive is configured correctly in the Disk 
Drives of BIOS Setup. 
2.  Ensure the diskette drive is correctly formatted.
3.  Diskette drive connection/cable 
4.  Diskette drive 
5.  Main board
Diskette drive does not work. 1.  Ensure the diskette drive is not set to None in the Disk Drives of 
BIOS Setup. 
2.  Diskette drive power
3.  Diskette drive connection/cable 
4.  Diskette drive 
5.  Main board
Diskette drive read/write error. 1.  Diskette.
2.  Ensure the diskette drive is not set to Write protect in the 
Security Options of BIOS Setup.
3.  Diskette drive cable.
4.  Diskette drive.
5.  Main board. 
						

							Chapter 472
Diskette drive LED comes on for more than 2 
minutes when reading data.1.  Diskette
2.  Diskette drive connection/cable 
3.  Diskette drive
4.  Main board
Diskette drive LED fails to light, and the drive 
is unable to access for more than 2 minutes.1.  Diskette
2.  Diskette drive power
3.  Diskette drive connection/cable 
4.  Diskette drive
5.  Main board
Diskette drive test failed. 1.  Diskette
2.  Diskette drive
3.  Diskette drive cable
4.  Main board
Hard Disk Drive
NOTE: Ensure hard disk drive is configured correctly in BIOS Setup, cable/jumper are set correctly 
before diagnosing any hard disk drive problems. (If only one drive is installed, please make 
sure the drive is connected to master connector or the drive is set to master.)
Hard disk drive test failed. 1.  Enter BIOS Setup and Load default settings. 
2.  Hard disk drive cable.
3.  Hard disk drive.
4.  Main board.
Hard disk drive cannot format completely. 1.  Enter BIOS Setup and Load default settings. 
2.  Hard disk drive cable.
3.  Hard disk drive.
4.  Main board.
Hard disk drive has write error. 1.  Enter BIOS Setup and Load default settings. 
2.  Hard disk drive.
Hard disk drive LED fails to light, but system 
operates normally.1.  With the system power on, measure the voltage of hard disk LED 
connector.  
2.  Hard drive LED cable.
CD/DVD-ROM Drive
NOTE: Ensure CD/DVD-ROM drive is configured correctly in BIOS Setup, cable/jumper are set 
correctly and its laser beam is clean before diagnosing any CD/DVD-ROM drive problems. 
CD/DVD-ROM drive LED doesnt come on 
but works normally.1.  CD/DVD-ROM drive
CD/DVD-ROM drive LED flashes for more 
than 30 seconds before LED shutting off.
Software asks to reinstall disc.
Software displays a reading CD/DVD error.1.  CD/DVD-ROM may have dirt or foreign material on it. Check with 
a known good disc.   
2.  CD/DVD-ROM is not inserted properly.   
3.  CD/DVD-ROM is damaged.   
CD/DVD-ROM drive cannot load or eject 
when the system is turned on and its eject 
button is pressed and held.1.  Disconnect all cables from CD/DVD-ROM drive except power 
cable, then press eject button to try to unload the disk. 
2.  CD/DVD-ROM drive power.
3.  CD/DVD-ROM drive
CD/DVD-ROM drive does not read and there 
are no messages are displayed.1.  CD may have dirt or foreign material on it. Check with a known 
good disc.
2.  Ensure the CD/DVD-ROM driver is installed properly. 
3.  CD/DVD-ROM drive.
CD/DVD-ROM drive can play audio CD but 
no sound output.1.  Ensure the headphone jack of the CD/DVD-ROM has an output.
2.  Turn up the sound volume.
3.  Speaker power/connection/cable.
4.  CD/DVD-ROM drive. 
Real-Time Clock
Real-time clock is inaccurate. 1.  Ensure the information in the Date and Time of BIOS Setup is 
set correctly.  
2.  RTC battery.   
3.  Main board
Error SymptomAction/FRU 
						

							73Chapter 4
Audio
Audio software program invokes but no sound 
comes from speakers.1.  Speaker power/connection/cable.
Modem
Modem ring cannot wake up system from 
suspend mode. 1.  For the External Modem, make sure Power on By Ring in BIOS 
Setup or Power Management is set to Enabled. For the PCI 
modem, make sure Wake up by PCI card is set to Enabled. 
2.  If PCI modem card is used, reinsert the modem card to PCI slot 
firmly or replace the modem card. 
3.  In Win 98, ensure the telephone application is configured 
correctly for your modem and set to receive messages and/or 
fax. 
Data/fax modem software program invokes 
but cannot receive/send data/fax1.  Ensure the modem card is installed properly.
Fax/voice modem software program invokes 
but has no sound output. (Data files are 
received normally; voice from modem cannot 
be produced, but system sound feature works 
normally.)1.  Ensure the modem voice-in cable from modem adapter card to 
main board 
Video and Monitor
Video memory test failed.
Video adapter failed.1.  Remove all non-factory-installed cards.
2.  Load default settings (if screen is readable).
3.  Main board
Display problem:
 - Incorrect colors
No high intensity
Missing, broken, or incorrect characters
Blank monitor(dark)
Blank monitor(bright)
Distorted image
Unreadable monitor
Other monitor problems1.  Monitor signal connection/cable.
2.  Monitor   
3.  Video adapter card  
4.  Main board  
Display changing colors. 1.  Monitor signal connection/cable
2.  Monitor
3.  Main board
Display problem not listed above (including 
blank or illegible monitor).1.  “Monitor.
2.  Load default settings (if screen is readable).
3.  Main board
Error SymptomAction/FRU 
						

							Chapter 474
Parallel/Serial Ports
Execute “Load BIOS Default Settings” in BIOS Setup to confirm ports presence before diagnosing any parallel/serial 
ports problems.
Serial or parallel port loop-back test failed. 1.  Make sure that the LPT# or COM# you test is the same as the 
setting in BIOS Setup.
2.  Loop-back.
3.  Main board.
Printing failed.  1.  Ensure the printer driver is properly installed. Refer to the printer 
service manual.
2.  Printer.
3.  Printer cable.
4.  Main board.
Printer problems. 1.  Refer to the service manual for the printer.
Keyboard
Some or all keys on keyboard do not work. 1.  Keyboard
Power Supply
Pressing power switch does not turn off 
system. (Only unplugging the power cord 
from electrical outlet can turn off the system.)1.  Ensure the Power Switch < 4 sec. in BIOS Setup of Power 
Management is not set to Instant-off. 
2.  Power switch cable assembly  
Pressing power switch does not turn on the 
system.1.  Ensure the power override switch (situated at the back of the 
machine, just above the connector for the power cable) is not set 
to OFF.
2.  Power switch cable assembly.
Executing software shutdown from 
Windows98 Start menu does not turn off the 
system. (Only pressing power switch can turn 
off the system). 1.  Load default settings.
2.  Reload software from Recovery CD.
No system power, or power supply fan is not  
running. 1.  Power Supply 
2.  Main board
Other Problems
Any other problems.  1.  Undetermined Problems 
Error SymptomAction/FRU