Acer Travelmate 2480 Service Guide
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92Chapter 4 Phoenix BIOS Beep Codes CodeBeepsPOST Routine Description 02h Verify Real Mode 03h Disable Non-Maskable Interrupt (NMI) 04h Get CPU type 06h Initialize system hardware 07h Disable shadow and execute code from the ROM. 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 during warm boot 13h Initialize PCI Bus Mastering devices 14h Initialize keyboard controller 16h 1-2-2-3 BIOS ROM checksum 17h Initialize cache before memory autosize 18h 8254 timer initialization 1Ah 8237 DMA controller initialization 1Ch Reset Programmable Interrupt Controller 20h 1-3-1-1 Test DRAM refresh 22h 1-3-1-3 Test 8742 Keyboard Controller 24h Set ES segment register to 4 GB 28h Autosize DRAM 29h Initialize POST Memory Manager 2Ah Clear 215 KB base RAM 2Ch 1-3-4-1 RAM failure on address line xxxx 2Eh 1-3-4-3 RAM failure on data bits xxxx of low byte of memory bus 2Fh Enable cache before system BIOS shadow 32h Test CPU bus-clock frequency 33h Initialize Phoenix Dispatch Manager 36h Warm start shut down 38h Shadow system BIOS ROM 3Ah Autosize cache 3Ch Advanced configuration of chipset registers 3Dh Load alternate registers with CMOS values 41h Initialize extended memory for RomPilot. 42h Initialize interrupt vectors 45h POST device initialization 46h 2-1-2-3 Check ROM copyright notice
Chapter 493 47h Initialize I20 support 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 55h Enable USB devices 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 cache 5Ch Test RAM between 512 and 640 KB 60h Test extended memory 62h Test extended memory address lines 64h Jump to User Patch1 66h Configure advanced cache registers 67h Initialize Multi Processor APIC 68h Enable external and CPU caches 69h Setup System Management Mode (SMM) area 6Ah Display external L2 cache size 6Bh Load custom defaults (optional) 6Ch Display shadow-area message 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 Data Area 89h Enable Non-Maskable Interrupts (NMIs) 8Ah Initialize Extended BIOS Data Area CodeBeepsPOST Routine Description
94Chapter 4 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 securi ty 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 AAh Scan for F2 key stroke ACh Enter SETUP AEh Clear Boot flag B0h Check for errors B1h Inform RomPilot about the end of POST. B2h POST done- prepare to boot operating system B4h 1 One short beep before boot B5h Terminate QuietBoot (optional) B6h Check password (optional) B7h Initialize ACPI BIOS B9h Prepare Boot BAh Initialize SMBIOS 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) CodeBeepsPOST Routine Description
Chapter 495 C7h Initialize notebook docking late C8h Force check (optional) C9h Extended checksum (optional) CAh Redirect Int 15h to enable remote keyboard CBh Redirect Int 13h to Memory Technologies Devices such as ROM, RAM, PCMCIA, and serial disk. CCh Redirect Int 10h to enable remote serial video CDh Re-map I/O and memory for PCMCIA CEh Initialize digitizer and display message. D2h Unknown interrupt The following are for 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 Mu lti 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 vectors F1h Initialize Run Time Clock F2h Initialize video F3h Initialize System Management Mode F4h 1 Output one beep F5h Clear Huge Segment F6h Boot to Mini DOS F7h Boot to Full DOS CodeBeepsPOST Routine Description
96Chapter 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 adjusted Enter BIOS Utility to execute “Load Setup Default Settings”, then reboot system. Reconnect the LCD connectors. Keyboard (if the brightness function key doesnt work). LCD cable LCD inverter LCD Main board Unreadable LCD screen Missing pels in characters Abnormal screen Wrong color displayed LCD has extra horizontal or vertical lines displayed. Reconnect the LCD cable LCD cable LCD Main board Indicator-Rela ted Symptoms Symptom / ErrorAction in Sequence Indicator incorrectly remains off or on, but system runs correctly Main board HDD/CD-ROM active indicators cannot work HDD/CD-ROM drive Device driver Main board Power-Related Symptoms Symptom / ErrorAction in Sequence Power shuts down during operation Power source (battery pack and power adapter). See “Power System Check” on page 87. Battery pack AC adapter See if the thermal module is overheat (Heat sink or fan). Main board The system cannot power-on. Power source (battery pack and power adapter). See “Power System Check” on page 87. Battery pack Power adapter CPU Main board The system cannot power-off. In Windows XP operat ing system, hold and press the power switch for more than 4 seconds. If the system can power off, then the main board is OK. Verify OS in the HDD. Main board
Chapter 497 Battery can’t be charged or discharged See “Check the Battery Pack” on page 88. Battery pack Main board System hang during POST ODD/HDD/FDD/RAM module Main board PCMCIA-Related Symptoms Symptom / ErrorAction in Sequence System cannot detect the PC Card (PCMCIA) PCMCIA slot assembly Main board PCMCIA slot pin is damaged. PCMCIA slot assembly PC Card cannot be inserted or ejected Check if the PCMCIA slot is blocked Main board Memory-Related Symptoms Symptom / ErrorAction in Sequence Memory count (size) appears different from actual size. Enter BIOS Setup Utility to execute “Load Default Settings” then reboot system. RAM module Main board Check BIOS revision System can power on, but you hear two long beeps: “B--, B--” and the LCD is blank. Reinsert DIMM DIMM Main board Speaker-Related Symptoms Symptom / ErrorAction in Sequence In Windows, multimedia programs, no sound comes from the computer. OS volume control Audio driver Speaker Main board Internal speakers make noise or emit no sound. Speaker Main board Microphone cannot work Audio driver Volume control in Windows XP Main board Power Management-Related Symptoms Symptom / ErrorAction in Sequence The system will not enter hibernation mode Power option in Windows XP Hard disk drive Main board The system doesn’t enter standby mode after closing the lid of the portable computer. Driver of Power Option Properties Lid close switch in upper case Main board Power-Related Symptoms Symptom / ErrorAction in Sequence
98Chapter 4 The system doesnt resume from hibernation/ standby mode.Connect AC adapter then check if the system resumes from Standby/Hibernation mode. Check if the battery is low. Hard disk drive Main board The system doesnt resume from standby mode after opening the lid of the portable computer. LCD cover switch Main board Battery fuel gauge in Windows doesn’t go higher than 90%. Refresh battery (continue use battery until power off, then charge battery). Battery pack Main board System hangs intermittently. Reconnect hard disk/CD-ROM drives. Main board Peripheral-Related Symptoms Symptom / ErrorAction in Sequence System configuration does not match the installed devices. Enter BIOS Setup Utility to execute “Load Setup defaults”, then reboot system. Reconnect hard disk/CD-ROM drives/FDD or other peripherals. Main board External display does not work correctly. Press Fn+F5, LCD/CRT/Both display switching Keyboard Main board USB does not work correctly Main board Print problems. Enter BIOS Setup Utility to execute “Load Default Settings” then reboot the system. Run printer self-test. Printer driver Printer cable Printer Main board Parallel port device problems Enter BIOS Setup Utility to execute “Load Default Settings” then reboot the system. Device driver Device cable Device Main board Keyboard/Touchpad-Related Symptoms Symptom / ErrorAction in Sequence Keyboard (one or more keys) does not work. Reconnect the keyboard cable. Keyboard Main board Touchpad does not work. Reconnect touchpad cable. Touchpad board Main board Power Management-Related Symptoms Symptom / ErrorAction in Sequence
Chapter 499 NOTE: If you cannot find a symptom or an error in this list and the problem remains, see “Undetermined Problems” on page 101. Modem/LAN-Rela ted Symptoms Symptom / ErrorAction in Sequence Internal modem does not wo rk correctly. Phone cable Driver Reconnect the Internal modem cable to the main board tightly. Main board Internal LAN does not work correctly Lan cable Driver Main board
100Chapter 4 Intermittent Problems Intermittent system hang problems can be caused by a variety of reasons that have nothing to do with a hardware defect, such as: cosmic radiation, electros tatic discharge, or software errors. FRU replacement should be considered only when a recurring problem exists. When analyzing an intermittent problem, do the following: 1. Run the diagnostic test for the system board in loop mode at least 10 times. 2. If no error is detected, do not replace any FRU. 3. If any error is detected, replace t he FRU. Rerun the test to verify that there are no more errors.
Chapter 4101 Undetermined Problems The diagnostic problems does not identify which adapter or device failed, which installed devices are incorrect, whether a short circuit is suspected, or whether the system is inoperative. Follow these procedures to isolate the faili ng FRU (do not isolate non-defective FRU). NOTE: Verify that all attached devices are supported by the computer. NOTE: Verify that the power supply being used at the time of the failure is operating correctly. (See “Power System Check” on page 87): 1. Power-off the computer. 2. Visually check them for damage. If an y problems are found, replace the FRU. 3. Remove or disconnect all of the following devices: TNon-Acer devices TPrinter, mouse, and other external devices TBattery pack THard disk drive TDIMM TPC Cards 4. Power-on the computer. 5. Determine if the problem has changed. 6. If the problem does not recur, reconnect the remove d devices one at a time until you find the failing FRU. 7. If the problem remains, replace the following FRU one at a time. Do not replace a non-defective FRU: TSystem board TLCD assembly