Acer 4520 manual Code Beeps Post Routine Description

Page 84

Code

Beeps

POST Routine Description

 

 

 

6Eh

 

Display possible high address for UMB

 

 

recovery

 

 

 

70h

 

Display error messages

 

 

 

72h

 

Check for configuration errors

 

 

 

76h

 

Check for keyboard errors

 

 

 

7Ch

 

Set up hardware interrupt vectors

 

 

 

7Eh

 

Initialize coprocessor if present

 

 

 

80h

 

Disable onboard Super I/O ports and

 

 

IRQs

 

 

 

81h

 

Late POST device initialization

 

 

 

82h

 

Detect and install external RS232 ports

 

 

 

83h

 

Configure non-MCD IDE controllers

 

 

 

84h

 

Detect and install external parallel ports

 

 

 

85h

 

Initialize PC-compatible PnP ISA devices

 

 

 

86h

 

Re-initialize onboard I/O ports

 

 

 

87h

 

Configure motherboard configurable

 

 

devices (optional)

 

 

 

88h

 

Initialize BIOS Area

 

 

 

89h

 

Enable Non-Maskable Interrupts (NMIs)

 

 

 

8Ah

 

Initialize Extended BIOS Data Area

 

 

 

8Bh

 

Test and initialize PS/2 mouse

 

 

 

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

 

Initialize security engine (optional)

 

 

 

9Eh

 

Enable hardware interrupts

 

 

 

9Fh

 

Determine number of ATA and SCSI

 

 

drives

 

 

 

A0h

 

Set time of day

 

 

 

A2h

 

Check key lock

 

 

 

A4h

 

Initialize typematic rate

 

 

 

A8h

 

Erase F2 prompt

 

 

 

74

Chapter 4

Image 84
Contents Acer TravelMate 4520 Notebook Computer Service Guide Revision History Copyright IIIConventions Service Guide Coverage Page Table of Contents System Troubleshooting ViiiTest Compatible Components Table of Contents Features ChapterComputing platform MemoryDisplay and graphics AudioCommunications Keyboard and special keysStatus indicators Power subsystemSystem security and compliance features InterfacePhysical specifications Environmental specificationsAccessories SoftwareTravelMate Tour Open Front ViewClose Front View Left View ODDRight View Rear ViewBase View Status Indicators WlanEasy-launch Keys Productivity Keys Phoenix TrustedCore Setup Utility System UtilitiesAccessing the Setup Utility Navigating Through the Setup Utility Setup Utility Menus InformationUuid Enabled DisabledMain 128 MBSecurity Setting a system password To set a system passwordTo change a system password To remove a system passwordTo clear a lost password Page Boot To set the boot drive sequenceExit Bios Flash Utility Bios Flash PrecautionsBios Recovery Launch Manager Select Start All Programs Launch ManagerChapter Disassembly Tools Stages of the Disassembly ProcessEquivalent Torque Values Pre-disassembly Procedure System Screw ListExternal Modules Disassembly External Modules Disassembly FlowchartRemoving the SD Dummy Card Removing the PC Card Dummy CardRemoving the Battery Pack Removing the Lower Case Cover Removing the Memory ModulesRemoving the Wlan Board Removing and Dismantling the HDD Assembly SilverM3 x L4 Removing and Dismantling the ODD Assembly BlackDetach the ODD bracket from the module Chapter Removing the Processor Cooling Fan Removing the Heat Sink Removing the Processor Torque value 3 kgf-cm +/-15%Main Unit Disassembly Main Unit Disassembly FlowchartRemoving the Middle Cover Removing the KeyboardRemoving 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 Modem Board Removing the SpeakersChapter LCD Module Disassembly LCD Module Disassembly FlowchartRemoving the LCD Bezel Removing the Inverter Board Removing the LCD Module Hinges Removing the LCD PanelRemoving the LCD-CCD Cable Removing the LCD Panel Brackets Removing the Internal Microphone and the CCD Board Removing the Wlan Antennas System Troubleshooting Hardware Diagnostic ProcedureSystem Check Procedures External Diskette Drive CheckExternal CD-ROM Drive Check Keyboard or Auxiliary Input Device CheckPower System Check Memory CheckCheck the AC Adapter Check the Battery Pack Touchpad CheckPost Error Indicators Post Error MessageBios ROM DimmCmos CPU IDSystem Error No Beep Post Beep Codes PostSetup Code Beeps Post Routine Description Code Beeps Post Routine Description Code Beeps Post Routine Description Index of Symptom-to-FRU Error Message LCD-related SymptomsMemory-related Symptom Related Symptoms Intermittent Problems Undetermined Problems Online Support Information System Block Diagram and Board Layout System Block DiagramSystem Board Layout Top ViewBottom 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 Appendix a Model a TravelMateModel B TravelMate Model C TravelMate K17RSModel D TravelMate HgstYEC Model E TravelMate 112 Appendix B Hardware Compatibility TestsAppendix B Appendix B 115 Games and Software Compatibility Tests Appendix C ProcessorSystem Controllers Memory HYMP564S64C HYMP512S64CVideo Interface Audio InterfacePdif USB InterfaceLAN Controller Wlan ControllerCKIP, Tkip Battery Pack USBAC Adapter SADP-65KB DBE ADP-90SB Bbea LFHard Disk Drive MK1237GSXHlds GSA-T20NDVR-K17RS DVD-RWSystem Bios LCD InverterPower 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.