Acer Travelmate 420 Service Guide
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Chapter 483 Power-On Self-Test (POST) Error Message The POST error message index lists the error message and their possible causes. The most likely cause is listed first. 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. This index can also help you determine the next possible FRU to be replaced when servicing a computer. If the symptom is not listed, see “Undetermined Problems” on page 90. The following lists the error messages that the BIOS displays on the screen and the error symptoms classified by function. 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. TM420.book Page 83 Monday, September 23, 2002 10:27 AM
84Chapter 4 Index of Error Messages Error Message List Error MessagesFRU/Action in Sequence 0200 Failure Fixed Disk Hard disk error detected. Check to see if fixed disk is attached properly. Enter the BIOS Setup Utility and verify the hard disk is detected. 0210 Stucky Key A key is stuck during keyboard initial. Please restart your system without pressing any keys. 0211 Keyboard error see “Keyboard or Auxiliary Input Device Check” on page 79. 0212 Keyboard Controller Failed see “Keyboard or Auxiliary Input Device Check” on page 79. May require replacing the keyboard controller. 0213Keyboard locked - Unlock key switch Unlock the system to proceed. 0220 Monitor type does not match CMOS - Run SETUPDisplay device mismatch. Enter the BIOS Setup Utility and verify the parameters (try loading the default settings); then save and restart the computer. 0230 System RAM Failed at offset: nnnn Shadow RAM test failed Main board 0231 Shadow RAM Failed at offset: nnnn System RAM test failed Main board 0232 Extended RAM Failed at address line: nnnn Extended RAM test failed Main board 0250 System battery is dead - Replace and run SETUPCMOS clock battery needs to be replaced. Replace the battery and run BIOS Setup Utility to reconfigure system time, then reboot system. 0251 System CMOS checksum bad - Default configuration usedCMOS data lost caused CMOS checksum failed. Default CMOS is being restored to allow system runs correctly. Enter Setup to customize the settings. 0252 Password checksum bad- Password clearedPassword checksum bad caused by CMOS lost. Please enter Setup to set your Password again. 0260 System timer error System timer test fiailed, and the main board needs to be repaired. Run BIOS Setup Utility to reconfigure system time, then reboot system. Main board 0270 Real time clock error RTC battery Run BIOS Setup Utility to reconfigure system time, then reboot system. Main board 0271 Check date and time settings RTC time lost. Enter Setup to set the correct date and time. 0280 Previous boot incomplete - Default configuration usedPrevious boot-up was not copleted successfully. Enter the BIOS Setup Utility and verify the parameters (try loading the default settings); then save and restart the computer. RTC battery Main board 0281 Memory size found by POST differed from EISA CMOSRun “Load Setup Defaults” in BIOS Setup Utility. Main board 02B0 Diskette drive A error Drive A: is present but fails the BIOS POST diskette tests. Check the drive is defined with the proper diskette type in BIOS Setup Utility Check if the diskette drive is attached correctly. See “External Diskette Drive Check” on page 78. TM420.book Page 84 Monday, September 23, 2002 10:27 AM
Chapter 485 02B1 Diskette drive B error Drive B: is present but fails the BIOS POST diskette tests. Check the drive is defined with the proper diskette type in BIOS Setup Utility Check if the diskette drive is attached correctly. See “External Diskette Drive Check” on page 78. 02B2 Incorrect Drive A type - run SETUP Type of floppy drive A: not correctly identified in Setup. Main board 02B2 Incorrect Drive B type - run SETUP Type of floppy drive B: not correctly identified in Setup. Main board 02D0 System cache error - Cache disabled RAM cache failed and BIOS disabled the cache. On older boards, check the cache jummpers. You may have to replace the cache. Main board 02F0 CPU ID CPU socket number for Multi-Processor error. Main board 02F4 EISA CMOS not writeable System unable to write to EISA CMOS. Main board 02F5 DMA Test Failed System unable to write to DMA (Direct Memory Access) registers. Main board 02F6 Software NMI Failed System unable to generate software NMI (Non-Maskable Interrupt). Main board 02F7 Fail-Safe Timer NMI Failed Fail-Safe Timer takes too long. Main board Invalid System Configuration Data Error with NVRAM (CMOS) data. Enter the BIOS Setup Utility and verify the parameters (try loading the default settings); then save and restart your computer. Main board Operating system not found Operating system cannot be found on the boot device. Enter the BIOS Setup Utility and verify the parameters (try loading the default settings); then save and restart the computer. Recover hard disk. Reinstall the operating system. Parity Check 1 nnnnParity error found on system bus. BIOS attempts to locate the address and display it on the screen. If it cannot locate the address, it displays. Parity Check 2 nnnnParity error found on I/O bus. BIOS attempts to locate the address and display it on the screen. If it cannot locate the address, it displays . Error Message List Error MessagesFRU/Action in Sequence TM420.book Page 85 Monday, September 23, 2002 10:27 AM
86Chapter 4 Index of Symptom-to-FRU Error Message LCD-Related Symptoms Symptom / ErrorAction in Sequence LCD backlight doesnt work LCD is too dark LCD brightness cannot be adjusted LCD contrast cannot be adjustedEnter BIOS Utility to execute “Load Setup Defaults” on Exit screen, then reboot system. Reconnect the LCD connectors. Keyboard (if contrast and brightness function key doesnt work). LCD cable LCD inverter LCD Main board Unreadable LCD screen Missing pels in characters Abnormal screen Wrong color displayedReconnect the LCD connector LCD cable LCD inverter LCD Main board LCD has extra horizontal or vertical lines displayed.LCD inverter LCD cable LCD Main board Indicator-Related Symptoms Symptom / ErrorAction in Sequence Indicator incorrectly remains off or on, but system runs correctlyReconnect the inverter board Inverter board 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 79. Battery pack Power adapter Hard drive & battery connection board Main board The system doesn’t power-on. Power source (battery pack and power adapter). See “Power System Check” on page 79“. Battery pack Power adapter Hard drive & battery connection board Main board The system doesn’t power-off. Power source (battery pack and power adapter). See “Power System Check” on page 79. Hold and press the power switch for more than 4 seconds. Main board Battery can’t be charged See “Check the Power Adapter” on page 80. Battery pack Main board TM420.book Page 86 Monday, September 23, 2002 10:27 AM
Chapter 487 PCMCIA-Related Symptoms Symptom / ErrorAction in Sequence System cannot detect the PC Card (PCMCIA) See “System Diagnostic Diskette” on page 52. Please run Sycard 32 Bit test. PCMCIA slot assembly Main board PCMCIA slot pin is damaged. PCMCIA slot assembly Memory-Related Symptoms Symptom / ErrorAction in Sequence Memory count (size) appears different from actual size.DIMM Main board Speaker-Related Symptoms Symptom / ErrorAction in Sequence In Windows, multimedia programs, no sound comes from the computer. See “Sound Check” on page 82 Audio driver Speaker Main board Internal speakers make noise or emit no sound. See “Sound Check” on page 82 Speaker Main board Power Management-Related Symptoms Symptom / ErrorAction in Sequence The system will not enter hibernation Keyboard (if control is from the keyboard) Hard disk drive Main board The system doesnt enter hibernation mode and four short beeps every minute.Press Fn+F4 and see if the computer enters hibernation mode. Touchpad Keyboard Hard disk connection board Hard disk drive Main board The system doesn’t enter standby mode after closing the LCDLCD cover switch Main board The system doesnt resume from hibernation mode.Hard disk connection board Hard disk drive Main board The system doesnt resume from standby mode after opening the LCD.LCD cover switch Main board Battery fuel gauge in Windows doesn’t go higher than 90%. Remove battery pack and let it cool for 2 hours. Refresh battery (continue use battery until power off, then charge battery). Battery pack Main board System hangs intermittently. Reconnect hard disk drives. Hard disk drive connector Main board TM420.book Page 87 Monday, September 23, 2002 10:27 AM
88Chapter 4 NOTE: If you cannot find a symptom or an error in this list and the problem remains, see “Undetermined Problems” on page 90. 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/diskette drives. External display does not work correctly. See “System Diagnostic Diskette” on page 52 See if there is an error beep. If there is an erro beep, then change main board. Power off. Then check if RAM CPU BIOS are well-connected. Press Fn+F5 three times slowly LCD FPC LCD inverter LCD USB does not work correctly USB device cable is firmly connected into the USB ports. Test one USB port each time. USB socket is firmly secured to the main board. Main board Print problems. Ensure the “Parallel Port” in the “System Devices” of BIOS Setup Utility is set to Enabled. Onboard Devices Configuration Run parallel port test Printer driver Printer cable Printer 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 touch pad cable. Modem port is secured to the main board Touch pad FPC Audio/Touch pad board Main board Modem-Related Symptoms Symptom / ErrorAction in Sequence Internal modem does not work correctly. Ensure the telephone cable is firmly plugged into the telephone wall socket and the modem port of the computer. Modem phone port is secured to the main board. modem combo board Main board TM420.book Page 88 Monday, September 23, 2002 10:27 AM
Chapter 489 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, electrostatic 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 several times to isolate the problem. 2.If no error is detected, do not replace any FRU. 3.If any error is detected, replace the FRU. Rerun the test to verify that there are no more errors. If an error is detected by the main battery test, see “Check the Power Adapter” on page 80 If an error is detected by the display test, see “Index of Symptom-to-FRU Error Message” on page 86 . If an error is detected by the floppy disk drive test, see “External Diskette Drive Check” on page 78. If an error is detected by the keyboard test, see “Keyboard or Auxiliary Input Device Check” on page 79. TM420.book Page 89 Monday, September 23, 2002 10:27 AM
90Chapter 4 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 failing 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 71): 1.Power-off the computer. 2.Visually check them for damage. If any 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 TCD-ROM/Diskette drive Module TPC Cards 4.Power-on the computer. 5.Determine if the problem has changed. 6.If the problem does not recur, reconnect the removed 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: TMain board TLCD assembly TM420.book Page 90 Monday, September 23, 2002 10:27 AM
Chapter 491 POST Task Routines 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 46h 2-1-2-3 Check ROM copyright notice TM420.book Page 91 Monday, September 23, 2002 10:27 AM
92Chapter 4 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 Area 89h Enable Non-Maskable Interrupts (NMIs) 8Ah Initialize Extended BIOS Data Area 8Bh Test and initialize PS/2 mouse 8Ch Initialize floppy controller CodeBeepsPOST Routine Description TM420.book Page 92 Monday, September 23, 2002 10:27 AM