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...

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...

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...

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...

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...

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...

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...

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...

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...

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....