Acer Aspire 4920 4920G User Manual
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Chapter 4101 Power-On Self-Test (POST) Error Message The POST error message index lists the error message and their possible causes. NOTE: Perform the FRU replacement or actions in the sequence shown in FRU/Action column, if the FRU replacement does not solve the problem, put the original part back in the computer. Do not replace a non-defective FRU. The error messages are listed in the coming pages to indicate the BIOS signals on the screen and the error symptoms classified by functions. If the symptom is not included on the list, please refer to “Undetermined Problems”. NOTE: Most of the error messages occur during POST. Some of them display information about a hardware device, e.g., the amount of memory installed. Others may indicate a problem with a device, such as the way it has been configured. NOTE: If the system fails after you make changes in the BIOS Setup Utility menus, reset the computer, enter Setup and install Setup defaults or correct the error. 4(@TQJSF@#PPLCPPL1BHF.POEBZ .BZ 1.
102Chapter 4 Index of Error Messages Error Message List Error MessagesCheck or do the following in sequence: Stuck Key See “Keyboard or Auxiliary Input Device Check” on page 98. System CMOS checksum bad - Default configuration used TRTC battery. TRun the BIOS Setup Utility to reconfigure the system time, then reboot system. Real time clock error TRTC battery TRun the BIOS Setup Utility to reconfigure system time, then reboot system. TMainboard Previous boot incomplete - Default configuration used TRun “Load Setup Defaults” in BIOS Setup Utility. TRTC battery TMainboard Invalid System Configuration Data TRun “Load Setup Defaults” in BIOS Setup Utility. TMainboard Operating system not found TRun the BIOS Setup Utility to check if the fixed disk and drive A are properly identified. TCD/DVD-ROM drive THard disk drive TMainboard Power-on indicator turns off and LCD is blank. TPower source (battery pack and power adapter.) See “Power System Check” on page 99. TEnsure every connector is connected tightly and correctly. TReconnect the DIMM TMainboard Power-on indicator turns on and LCD is blank. TPower source (battery pack and power adapter.) See “Power System Check” on page 99. TReconnect the LCD connector THard disk drive TLCD cable TLCD inverter board TLCD TMainboard Power-on indicator turns on and LCD is blank. But you can see POST on an external CRT. TReconnect the LCD connectors. TLCD cable TLCD inverter board TLCD TMainboard Power-on indicator turns on and a blinking cursor shown on LCD during POST. TEnsure every connector is connected tightly and correctly. TMainboard Failure Fixed Disk TReconnect the hard disk drive connector. TRun “Load Setup Defaults” in BIOS Setup Utility. THard disk drive TMainboard 4(@TQJSF@#PPLCPPL1BHF.POEBZ .BZ 1.
Chapter 4103 No beep, power-on indicator turns off and LCD is blank.TPower source (battery pack and power adapter). See “Power System Check” on page 99. TEnsure every connector is connected tightly and correctly. TReconnect the DIMM. TLED board TMainboard No beep, power-on indicator turns on and LCD is blank. TPower source (battery pack and power adapter). See “Power System Check” on page 99. TReconnect the LCD connector THard disk drive TLCD inverter ID TLCD cable TLCD Inverter board TLCD TMainboard No beep, power-on indicator turns on and LCD is blank. But you can see POST on an external CRT. TReconnect the LCD connectors. TLCD inverter ID TLCD cable TLCD inverter board TLCD TMainboard No beep, power-on indicator turns on and a blinking cursor shown on LCD during POST. TEnsure every connector is connected tightly and correctly. TMainboard No beep during POST but system runs correctly. TSpeaker TMainboard Error Message List Error MessagesCheck or do the following in sequence: 4(@TQJSF@#PPLCPPL1BHF.POEBZ .BZ 1.
104Chapter 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 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 26h Enable A20 line 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 30h 1-4-1-1 RAM failure on data bits xxxx* of high byte of memory bus 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 42h Initialize interrupt vectors 45h POST device initialization 4(@TQJSF@#PPLCPPL1BHF.POEBZ .BZ 1.
Chapter 4105 46h 2-1-2-3 Check ROM copyright notice 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 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) CodeBeepsPOST Routine Description 4(@TQJSF@#PPLCPPL1BHF.POEBZ .BZ 1.
106Chapter 4 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 Multiprocessor 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 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 CodeBeepsPOST Routine Description 4(@TQJSF@#PPLCPPL1BHF.POEBZ .BZ 1.
Chapter 4107 * If the BIOS detects error 2C, 2E, or 3O (base 512K RAM error), it displays an additional word-bitmap (xxxx) indicating the address line or bits that failed. For example, 2C 0002 means address line 1 (bit one set) has failed. 2E 1020 means data bits 12 and 5 (bits 12 and 5 set) have failed in the lower 16 bits. Note that error 30 cannot occur on 386SX systems because they have a 16 rather than 32-bit bus. The BIOS also sends the bitmap to the port-80 LED display. It first displays the check point code, followed by a delay, the high-order byte, another delay, and then the low-order byte of the error. It repeats this sequence continuously. BIOS Beep Codes for Boot Block in Flash ROM 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 CodeBeepsFor 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 Multiprocessor 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 before boot F5h Boot to Mini DOS F6h Clear Huge Segment F7h Boot to Full DOS CodeBeepsPOST Routine Description 4(@TQJSF@#PPLCPPL1BHF.POEBZ .BZ 1.
108Chapter 4 Index of Symptom-to-FRU Error Message LCD-Related Symptoms Symptom / ErrorCheck or do the following in sequence LCD backlight doesnt work LCD is too dark LCD brightness cannot be adjusted LCD contrast cannot be adjusted TRun “Load Setup Defaults” in BIOS Setup Utility, then reboot system. TReconnect the LCD connectors. TKeyboard (if contrast and brightness function key doesnt work). TLCD inverter ID TLCD cable TLCD inverter board TLCD TMainboard Unreadable LCD screen Missing pels in characters Abnormal screen Wrong color displayed TReconnect the LCD connector TLCD inverter ID TLCD cable TLCD inverter board TLCD TMainboard LCD has extra horizontal or vertical lines displayed. TLCD inverter ID TLCD inverter board TLCD cable TLCD TMainboard Indicator-Related Symptoms Symptom / ErrorCheck or do the following in sequence Indicator incorrectly remains off or on, but system runs correctly TReconnect the inverter board. TMainboard Power-Related Symptoms Symptom / ErrorCheck or do the following in sequence Power shuts down during operation TPower source (battery pack and power adapter). See “Power System Check” on page 99. TBattery pack TPower adapter THard disk drive & battery connection board TMainboard The system doesn’t power-on. TPower source (battery pack and power adapter). See “Power System Check” on page 99. TBattery pack TPower adapter THard disk drive & battery connection board TMainboard 4(@TQJSF@#PPLCPPL1BHF.POEBZ .BZ 1.
Chapter 4109 The system doesn’t power-off.TPower source (battery pack and power adapter). See “Power System Check” on page 99. THold and press the power switch for more than 4 seconds. TMainboard Battery can’t be charged TSee “Check the Battery Pack” on page 99. TBattery pack TMainboard PCMCIA-Related Symptoms Symptom / ErrorCheck or do the following in sequence System cannot detect the PC Card (PCMCIA) TPCMCIA slot assembly TMainboard PCMCIA slot pin is damaged. PCMCIA slot assembly Memory-Related Symptoms Symptom / ErrorCheck or do the following in sequence Memory count (size) appears different from actual size. TRun “Load Setup Defaults” in BIOS Setup Utility, then reboot system. TDIMM TMainboard Speaker-Related Symptoms Symptom / ErrorCheck or do the following in sequence In Windows, multimedia programs, no sound comes from the computer. TAudio driver TSpeaker TMainboard Internal speakers make noise or emit no sound. TSpeaker TMainboard Power Management-Related Symptoms Symptom / ErrorCheck or do the following in sequence The system will not enter hibernation TSee “Save to Disk (S4)” on page 44. TKeyboard (if control is from the keyboard) THard disk drive TMainboard The system doesnt enter hibernation mode and four short beeps every minute. TPress Fn+o and see if the computer enters hibernation mode. TTouchpad TKeyboard THard disk connection board THard disk drive TMainboard The system doesn’t enter standby mode after closing the LCD TSee “Save to Disk (S4)” on page 44. TMainboard Power-Related Symptoms Symptom / ErrorCheck or do the following in sequence 4(@TQJSF@#PPLCPPL1BHF.POEBZ .BZ 1.
11 0Chapter 4 NOTE: If you cannot find a symptom or an error in this list and the problem remains, see “Undetermined Problems” on page 112. The system doesnt resume from hibernation mode. TSee “Save to Disk (S4)” on page 44. THard disk connection board THard disk drive TMainboard The system doesnt resume from standby mode after opening the LCD. TSee “Save to Disk (S4)” on page 44. TMainboard Battery fuel gauge in Windows doesn’t go higher than 90%. TRemove battery pack and let it cool for 2 hours. TRefresh battery (continue use battery until power off, then charge battery). TBattery pack TMainboard System hangs intermittently. TReconnect hard disk/CD-ROM drives. THard disk connection board TMainboard Peripheral-Related Symptoms Symptom / ErrorCheck or do the following in sequence System configuration does not match the installed devices. TRun “Load Setup Defaults” in BIOS Setup Utility, then reboot system. TReconnect hard disk/CD-ROM/diskette drives. External display does not work correctly. TPress Fn+F5 to switch to LCD or CRT TMainboard USB does not work correctly TMainboard Print problems. TRun printer self-test. TPrinter driver TPrinter cable TPrinter TMainboard Keyboard/Touchpad-Related Symptoms Symptom / ErrorCheck or do the following in sequence Keyboard (one or more keys) does not work. TReconnect the keyboard cable. TKeyboard TMainboard Touchpad does not work. TReconnect touchpad cable. TTouchpad board TMainboard Modem-Related Symptoms Symptom / ErrorCheck or do the following in sequence Internal modem does not work correctly. TModem phone port TModem combo board TMainboard Power Management-Related Symptoms Symptom / ErrorCheck or do the following in sequence 4(@TQJSF@#PPLCPPL1BHF.POEBZ .BZ 1.