6 Chapter Troubleshooting and Repair 6.1 Introduction This chapter provides the most common problem encountered with the A440 notebook computer and some troubleshooting means. Some of the common problems are: • • • • • • • • 6.1.
Troubleshooting and Repair Table 6-1(a) Message Diskette drive A failure POST Error Messages Possible Cause Action The drive failed or is missing. Check the drive to determine the problem. Floppy Disk Controller is disabled. Enabled the FDD Controller. Diskette read failure - press F1 to retry boot, F2 for SETUP utility The diskette is either not formatted or is defective. Replace the diskette with a bootable diskette and retry.
Troubleshooting and Repair Table 6-1(b) Message POST Error Messages Possible Cause Action Timer 2 failure The timer chip has failed. Check the system board. Turn the power off, then back on again. If the problem persists, contact qualified service personnel. F2 to enter ROM-based SETUP Invalid configuration information must be changed. You must run SETUP utility and correct configuration information. Invalid configuration information - please run SETUP Display adapter is configured incorrectly.
Troubleshooting and Repair 6.2.2 Informational Messages This section lists the messages that provide information to the user but require no action. Table 6-2 Message BIOS Informational Messages Meaning nnnK Base Memory The amount of base memory that tested successfully. nnnK Extended The amount of extended memory that tested successfully. Memory tests terminated by keystroke The message indicates that a user pressed the spacebar while memory tests were running and stopped the memory tests.
Troubleshooting and Repair range includes a location which when added to sum of the ranges, will produce a known result, such as zero. Beep codes for system board errors Table 6-3 (a) BIOS Beep Codes Beep Code Diagnostic Description Test Performed none 01h CPU registers test in progress or failure Pattern test of most of the 16-bit CPU registers. Failure will result in a system halt. 1-1-3 02h CMOS write/read test in progress or failure.
Troubleshooting and Repair Table 6-3 (b) BIOS Beep Codes Beep Code Diagnostic Description Test Performed 1-4-2 0Dh Parity failure first 64K RAM At the completion of the rolling ones and pattern tests of the first 64K, the BIOS checks the parity error bits (bits 7 and 6) of port 60h. Failure results in a system halt. 2-1-1 10h-1Fh First 64K RAM chip or data line failure on bit x The first 64K of RAM is tested with a rolling ones test and a pattern test.
Troubleshooting and Repair Table 6-3 (c) BIOS Beep Codes Beep Code Diagnostic Description Test Performed None 28h CMOS RAM power failure and checksum calculation test in progress. The power-fail bit in CMOS RAM is tested and the lower CMOS RAM area is being checksummed. A failure does not result in system halt. None 29h CMOS RAM configuration validation for video in progress.
Troubleshooting and Repair Table 6-3 (d) BIOS Beep Codes Beep Code Diagnostic 4-2-1 34h Timer-tick interrupt test in progress or failure. All interrupts expect the timer-tick interrupt are masked off at the interrupt controllers. If a timer-tick interrupt does not occur during a specific time period, an error message is displayed on the screen. The system does not halt. 4-2-2 35h Shutdown test in progress or failure.
Troubleshooting and Repair Table 6-3 (e) BIOS Beep Codes Beep Code Diagnostic 4-4-1 3Ch Serial port test in progress or failure. Pattern test of one or more of the installed serial ports. If a failure is detected, an error message will be displayed and POST will continue. 4-4-2 3Dh Parallel port test in progress or failure. Rolling ones test is done to one or more of the installed parallel ports. If a failure is detected, an error message will be displayed and POST will continue.
Troubleshooting and Repair 6.3 Quick Troubleshooting This section summarizes problems that may develop during system operation and lists suggested corrective actions to isolate problem properly. Table 6-5 (a) Problem or Symptoms No power (Power LED not on) Power LED is on but no display and system does not turn on Display on the LCD is unreadable LCD screen does not show display Battery Power does not last or does not read properly under Win95/Win98 6-10 Quick Troubleshooting Corrective Actions 1.
Troubleshooting and Repair Table 6-5 (b) Problem or Symptoms System halts during boot sequence I/O processing malfunctions Diskette drive does not work Hard disk drive malfunction CD-ROM drive malfunction Memory malfunction External keyboard or PS/2 mouse doesn’t work PCMCIA card does not work FIC A440 Series Service Manual Quick Troubleshooting Corrective Actions 1. Check condition of selected bootload device (diskette or hard disk) for bad boot track or incorrect OS files. 2.
Troubleshooting and Repair Table 6-5 (c) Problem or Symptoms Glidepad does not work Serial device does not work Parallel device does not work IR Port does not work. 6-12 Quick Troubleshooting Corrective Actions 1. Check if PS/2 mouse driver is properly installed. Remove any external PS/2 mouse. 2. Check the glidepad cable inside the system if it is inserted properly. 3. Replace the glidepad module. 4. Check the keyboard controller chip for any cold or loosed soldering. 5.
Troubleshooting and Repair Table 6-5 (d) Problem or Symptoms USB Port does not work Audio components does not work FIC A440 Series Service Manual Quick Troubleshooting Corrective Actions 1. Check if USB port option under BIOS Setup is ENABLED. 2. Check if USB device connection is OK. Unplug and replug the device. 3. Check if the USB port driver and the USB device driver are installed. 4. Replace USB device or contact USB device manufacturer for support. 5. Replace motherboard. 1.
Troubleshooting and Repair 6.4 ComponentComponent-Level Troubleshooting This section provides an easy to follow flowcharts for performing component-level troubleshooting on the A440 notebook. 6.4.
Troubleshooting and Repair 6.4.2 Starting Check START +5Vs = 5V +3Vs = 3.3V NO Check Q61, Pin3 = 12V, Q43 Pin 7 = 5V, Check DC-DC YES Check CPU10 Check Vcore7 NO Check U34 & Max1710 YES NO Check AHCLK Check U24, Pin45 YES NO Check DSC P4 Check U20, PIN 2 YES END Figure 6-1 6.4.3 Starting Check Memory Interface Check START Check Memory Vcc = 3.
Troubleshooting and Repair 6.4.4 CRT Interface Check START NO Check CN18 and CRT cable Check L25, L26, L27, L42, L43 YES Check VGA clock OSC NB=14.318MHz NO Check U24 Pin2 YES END Figure 6-3 CRT Interface Check 6.4.
Troubleshooting and Repair 6.4.6 HDD Interface Check 6 Check BIOS Setup Menu NO Enter correct HDD type or set to AUTO YES Check if HDD is properly formatted NO Use DOS FDISK and FORMAT YES Check HDD Power NO Check I/O board, CN612 Pin2, 3, 4 YES Check HDD Data Bus NO Check I/P board CN612 YES Check HDD Address Bus NO Check I/O Board CN612, Pin10,12,9,PDA0,PDA1,PDA2 YES END Figure 6-5 6.4.
Troubleshooting and Repair 6.4.8 Glidepad Interface Check 8 Check Glidepad Data Signal NO Check Audio Board CN6, Pin2, GLPDATA Signal YES Check Glidepad signal CLK NO Check Audio board CN6 Pin3, GLPCLK signal YES Check Glidepad Power NO Check CN6 ( On Audio Board ), Pin 1= 5V YES NO Check Glidepad IRQ Check U26 ( M38867 ) Pin 22, IRQ 12 END Figure 6-7 6.4.
Troubleshooting and Repair 6.4.10 Charger Board Interface Check 10 Plug-in AC adapter DC_IN = 20V NO Check M/B TW1, F1 YES Q6 = 5V NO Check AIO CHG_EN YES NO Charge Battery Check U1, Q6, Q7, Q8 YES NO Check SMBC, SMBD Check Battery Pack Voltage & Temp END Figure 6-9 Check U602, U401, F601 Charger Board Interface Check 6.4.
Troubleshooting and Repair 6.4.12 External Keyboard Check 12 Check Keyboard Data NO Check U26 Pin 7 ( EXT1DATA ) YES Check Keyboard Clock NO Check U26 Pin 4 ( EXT1CLK ) YES NO Check IRQ signal Check U26 Pin23 ( IRQ1) YES END Figure 6-11 Internal Keyboard Check 6.4.
Troubleshooting and Repair 6.4.14 Printer Port Interface Check 14 Check BIOS Setup NO Enter Correct Printer Mode YES Check Data Bus NO Check RP14, RP31 YES NO Check L107, L105 Check Busy Signal YES END Figure 6-13 Printer Port Interface Check 6.4.
Troubleshooting and Repair 6.4.16 PCMCIA Interface Check 16 Check software driver settings if OK NO Setup PCMCIA driver YES Check PCMCIA Power Check U39 Pin 7, 24 = +12V Pin 15, 16, 17 = +3V Pin 1, 2, 30 = +5V NO YES Check PCMCIA Control Signal NO Check U37 PCI1225 Signal YES END Figure 6-15 PCMCIA Interface Check 6.4.
Troubleshooting and Repair 6.4.18 IR Interface Check 18 Check IR Power NO Check I/O board U604 Pin 1 = +5V YES Check IR Component NO Replace IR YES NO Check I/O board U604, Pin 8, 9 Signal Check IR signal YES END Figure 6-17 IR Port Interface Check 6.4.
Troubleshooting and Repair 6.4.20 Suspend Function Check 20 Check BIOS Power Management if it is set to Save to RAM or DISK YES Execute Suspend routine by pressing + keys or pressing cover switch Suspend to RAM Suspend to DISK Check U16 Pin 27 (STR#) = 0V Pin 28 (STR#) = 0V Check U16, Pin 28 ( STD# = 0V ) Resume operation Resume operation Check U16, Pin27 ( STR# = 3.3V ) Check U16 , Pin28 ( STD# = 3.
Troubleshooting and Repair 6.4.
Troubleshooting and Repair 6.4.22 Cover Switch Function Check 22 NO Check BIOS Setup Setup Cover Switch YES NO Check Switch Press Cover Switch Check U26, Pin12, L1D## = 0V YES END Figure 6-21 Cover Switch Function Check 6.4.
Troubleshooting and Repair 6.4.24 DC-DC Power Check 24 Press Power Switch NO Check main board, F1,F3 Check I/O board F601 YES NO Q54 PIN 5,6,7,8 = 10V~20V Check U4 PIN 27,28 = +3V YES NO U7 PIN12= +5V Check Q51, Q52, L18, D41, D42, U7 YES NO L89 PIN1,2 = +3V Check Q53, Q54, D36, D34, L11, U7 YES NO D3 PIN1=12V Check U4 YES END Figure 6-23 DC-DC Power Check 6.4.
