Acer 4520 manual Code Beeps Post Routine Description

Page 85

Code

Beeps

POST Routine Description

 

 

 

AAh

 

Scan for F2 key stroke

 

 

 

ACh

 

Enter SETUP

 

 

 

AEh

 

Clear Boot flag

 

 

 

B0h

 

Check for errors

 

 

 

B2h

 

POST done—prepare to boot operating

 

 

system

 

 

 

B4h

1

One short beep before boot

 

 

 

B5h

 

Terminate QuietBoot (optional)

 

 

 

B6h

 

Check password (optional)

 

 

 

B9h

 

Prepare Boot

 

 

 

BAh

 

Initialize DMI parameters

 

 

 

BBh

 

Initialize PnP Option ROMs

 

 

 

BCh

 

Clear parity checkers

 

 

 

BDh

 

Display MultiBoot menu

 

 

 

BEh

 

Clear screen (optional)

 

 

 

BFh

 

Check virus and backup reminders

 

 

 

C0h

 

Try to boot with INT 19

 

 

 

C1h

 

Initialize POST Error Manager (PEM)

 

 

 

C2h

 

Initialize error logging

 

 

 

C3h

 

Initialize error display function

 

 

 

C4h

 

Initialize system error handler

 

 

 

C5h

 

PnPnd dual CMOS (optional)

 

 

 

C6h

 

Initialize notebook docking (optional)

 

 

 

C7h

 

Initialize notebook docking late

 

 

 

C8h

 

Force check (optional)

 

 

 

C9h

 

Extended checksum (optional)

 

 

 

D2h

 

Unknown interrupt

 

 

 

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

 

 

 

Chapter 4

75

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Contents Acer TravelMate 4520 Notebook Computer Service Guide Revision History III CopyrightConventions Service Guide Coverage Page Table of Contents Viii System TroubleshootingTest Compatible Components Table of Contents Chapter FeaturesComputing platform MemoryAudio Display and graphicsCommunications Keyboard and special keysPower subsystem Status indicatorsSystem security and compliance features InterfaceEnvironmental specifications Physical specificationsAccessories SoftwareOpen Front View TravelMate TourClose Front View ODD Left ViewRear View Right ViewBase View Wlan Status IndicatorsEasy-launch Keys Productivity Keys System Utilities Phoenix TrustedCore Setup UtilityAccessing the Setup Utility Navigating Through the Setup Utility Information Setup Utility MenusUuid Disabled EnabledMain 128 MBSecurity To set a system password Setting a system passwordTo remove a system password To change a system passwordTo clear a lost password Page To set the boot drive sequence BootExit Bios Flash Precautions Bios Flash UtilityBios Recovery Select Start All Programs Launch Manager Launch ManagerChapter Stages of the Disassembly Process Disassembly ToolsEquivalent Torque Values System Screw List Pre-disassembly ProcedureExternal Modules Disassembly Flowchart External Modules DisassemblyRemoving the PC Card Dummy Card Removing the SD Dummy CardRemoving the Battery Pack Removing the Memory Modules Removing the Lower Case CoverRemoving the Wlan Board Silver Removing and Dismantling the HDD AssemblyM3 x L4 Black Removing and Dismantling the ODD AssemblyDetach the ODD bracket from the module Chapter Removing the Processor Cooling Fan Removing the Heat Sink Torque value 3 kgf-cm +/-15% Removing the ProcessorMain Unit Disassembly Flowchart Main Unit DisassemblyRemoving the Keyboard Removing the Middle CoverRemoving the LCD Module Chapter Page M2.5 x L8 BZN+NYLOK Removing the Upper Case M2.5 x L4 BZN+NYLOK Removing the LED Board Removing the Fingerprint and Touchpad Boards Remove the screws securing the fingerprint board bracket Removing the Card Reader Board Removing the Bluetooth Board Removing the System Board Removing the Speakers Removing the Modem BoardChapter LCD Module Disassembly Flowchart LCD Module DisassemblyRemoving the LCD Bezel Removing the Inverter Board Removing the LCD Panel Removing the LCD Module HingesRemoving the LCD-CCD Cable Removing the LCD Panel Brackets Removing the Internal Microphone and the CCD Board Removing the Wlan Antennas Hardware Diagnostic Procedure System TroubleshootingExternal Diskette Drive Check System Check ProceduresExternal CD-ROM Drive Check Keyboard or Auxiliary Input Device CheckMemory Check Power System CheckCheck the AC Adapter Touchpad Check Check the Battery PackPost Error Message Post Error IndicatorsDimm Bios ROMCmos CPU IDSystem Error No Beep Post Post Beep CodesSetup Code Beeps Post Routine Description Code Beeps Post Routine Description Code Beeps Post Routine Description LCD-related Symptoms Index of Symptom-to-FRU Error MessageMemory-related Symptom Related Symptoms Intermittent Problems Undetermined Problems Online Support Information System Block Diagram System Block Diagram and Board LayoutTop View System Board LayoutBottom View System Switch FRU Field Replaceable Unit List Aspire 5910 Exploded Diagram TravelMate 4520 FRU List Cables Chapter Fan Hard Disk Drive Keyboard Chapter Keyboard TM Mechanical parts Chapter Memory Optical Disc Drive Power-related Processor Chapter Screws Miscellaneous Audio-related Boards Chapter Cables Fan Hard Disk Drive 100 Chapter Chapter 101 LCD Panel 102 Chapter Chapter 103 Memory Optical Disc Drive 104 Chapter Chapter 105 Screws Miscellaneous 106 Chapter Model a TravelMate Appendix aModel B TravelMate K17RS Model C TravelMateHgst Model D TravelMateYEC Model E TravelMate 112 Hardware Compatibility Tests Appendix BAppendix B Appendix B 115 Games and Software Compatibility Tests Processor Appendix CSystem Controllers HYMP564S64C HYMP512S64C MemoryAudio Interface Video InterfacePdif USB InterfaceWlan Controller LAN ControllerCKIP, Tkip USB Battery PackAC Adapter SADP-65KB DBE ADP-90SB Bbea LFMK1237GSX Hard Disk DriveGSA-T20N HldsDVR-K17RS DVD-RWLCD Inverter System BiosPower Management 126 Index Removing Part number 89 125 Wlan External FDD 66 keyboard 66 memory Index 133
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4520 specifications

The Acer 4520 laptop is a versatile and economically accessible device that caters to a wide variety of computing needs. Launched in the mid-2000s, this laptop became particularly popular among students and working professionals, thanks to its balance of performance, portability, and affordability.

One of the standout features of the Acer 4520 is its durable yet lightweight design, which weighs around 2.6 kg. This makes it easy to carry around, whether for commuting to school or taking it to a coffee shop for remote work. The 15.4-inch screen with a resolution of 1280 x 800 pixels provides a decent visual experience, suitable for both productivity tasks and media consumption.

In terms of performance, the Acer 4520 is typically equipped with AMD processors, such as the AMD Turion X2 or Athlon series, which are designed to deliver competent multitasking capabilities. The laptop usually comes with 1GB or 2GB of RAM, allowing users to run essential applications smoothly. Additionally, the device features a 120GB to 250GB hard drive, providing ample storage space for documents, photos, and multimedia files.

Connectivity is another strong point of the Acer 4520. It comes with a variety of ports, including USB 2.0, VGA, and audio jacks, as well as a built-in webcam for video conferencing and social interaction. The laptop supports Wi-Fi connectivity, enabling users to access the internet wirelessly, which is essential for both personal and professional use.

The Acer 4520 also integrates several multimedia features, including a DVD-RW drive for reading and writing optical discs, along with built-in speakers that deliver sound decent enough for casual listening. Additionally, it supports Acer's own PowerSmart technology, which helps manage battery life and optimize performance, allowing users to prolong their usage time during on-the-go scenarios.

Furthermore, the laptop offers a user-friendly operating system, commonly shipped with Windows Vista or later versions, providing a familiar environment for users. Overall, the Acer 4520 stands out with its balanced range of features, reliability, and economical price point, making it an attractive option for budget-conscious individuals seeking a capable laptop for everyday tasks. This blend of utility and performance ensures that the Acer 4520 remains relevant for basic computing needs even years after its initial release.