Acer Aspire 5740d Service Guide
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Chapter 493 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 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 CodeBeeps 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 Multi 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 before boot CodeBeepsPOST Routine Description
94Chapter 4 F5h Boot to Mini DOS F6h Clear Huge Segment F7h Boot to Full DOS CodeBeeps
Chapter 495 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 Default Settings”, then reboot system. Reconnect the LCD connectors. Keyboard (if contrast and brightness function key doesnt work). LCD inverter ID LCD cable LCD inverter LCD System board Unreadable LCD screen Missing pels in characters Abnormal screen Wrong color displayedReconnect the LCD connector LCD inverter ID LCD cable LCD inverter LCD System board LCD has extra horizontal or vertical lines displayed.LCD inverter ID LCD inverter LCD cable LCD System board Indicator-Related Symptoms Symptom / ErrorAction in Sequence Indicator incorrectly remains off or on, but system runs correctlyReconnect the inverter board Inverter board System 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 85. Battery pack Power adapter Hard drive & battery connection board System board The system doesn’t power-on. Power source (battery pack and power adapter). See “Power System Check” on page 85. Battery pack Power adapter Hard drive & battery connection board System board
96Chapter 4 The system doesn’t power-off. Power source (battery pack and power adapter). See “Power System Check” on page 85. Hold and press the power switch for more than 4 seconds. System board Battery can’t be charged See “Check the Battery Pack” on page 86. Battery pack System board PCMCIA-Related Symptoms Symptom / ErrorAction in Sequence System cannot detect the PC Card (PCMCIA) PCMCIA slot assembly System board PCMCIA slot pin is damaged. PCMCIA slot assembly 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. DIMM System board Speaker-Related Symptoms Symptom / ErrorAction in Sequence In Windows, multimedia programs, no sound comes from the computer. Audio driver Speaker System board Internal speakers make noise or emit no sound.Speaker System board Power Management-Related Symptoms Symptom / ErrorAction in Sequence The system will not enter hibernation See “Save to Disk (S4)” on page 20. Keyboard (if control is from the keyboard) Hard disk drive System board The system doesnt enter hibernation mode and four short beeps every minute.Press Fn+ o and see if the computer enters hibernation mode. Touchpad Keyboard Hard disk connection board Hard disk drive System board The system doesn’t enter standby mode after closing the LCDSee “Save to Disk (S4)” on page 20. LCD cover switch System board Power-Related Symptoms Symptom / ErrorAction in Sequence
Chapter 497 The system doesnt resume from hibernation mode.See “Save to Disk (S4)” on page 20. Hard disk connection board Hard disk drive System board The system doesnt resume from standby mode after opening the LCD.See “Save to Disk (S4)” on page 20. LCD cover switch System 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 System board System hangs intermittently. Reconnect hard disk/CD-ROM drives. Hard disk connection board System board Peripheral-Related Symptoms Symptom / ErrorAction in Sequence System configuration does not match the installed devices. Enter BIOS Setup Utility to execute “Load Default Settings”, then reboot system. Reconnect hard disk/CD-ROM/diskette drives. External display does not work correctly. Press Fn+F5, LCD/CRT/Both display switching System board USB does not work correctly System board Print problems. Onboard Devices Configuration Run printer self-test. Printer driver Printer cable Printer System Board Serial or parallel port device problems. Device driver Device cable Device System board Keyboard/Touchpad-Related Symptoms Symptom / ErrorAction in Sequence Keyboard (one or more keys) does not work.Reconnect the keyboard cable. Keyboard System board Touchpad does not work. Reconnect touchpad cable. Touchpad board System board Power Management-Related Symptoms Symptom / ErrorAction in Sequence
98Chapter 4 NOTE: If you cannot find a symptom or an error in this list and the problem remains, see “Undetermined Problems” on page 100. Modem-Related Symptoms Symptom / ErrorAction in Sequence Internal modem does not work correctly. Modem phone port modem combo board System board
Chapter 499 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 advanced 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 the FRU. Rerun the test to verify that there are no more errors.
100Chapter 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 85.): 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: •Non-Acer devices •Printer, mouse, and other external devices •Battery pack •Hard disk drive •DIMM •CD-ROM/Diskette drive Module •PC 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: •System board •LCD assembly
Chapter 5101 Main Board Top View No.CodeConnector 1 SPKR_L1 Left speaker cable connector 2 KB1 Keyboard cable connector 3 AMIC1 MIC cable connector 4 SPKR_R1 Right speaker cable connector 5 PSCN1 Volume button board cable connector 6 TPCN1 Touchpad board cable connector 7 FPCN1 Fingerprint cable connector 8 RTC1 RTC battery connector 9 USBCN1 USB cable connector Connector Locations Chapter 5
102Chapter 5 Bottom View No.CodeConnector 1 BT1 Bluetooth board cable connector 2 LOUT1 Headphone/speaker/line-out jack 3 MICIN1 Microphone-in jack 4 LIN1 Line-in port 5 USB1 & USB3 USB 2.0 ports 6CRT1 VGA port 7 FAN1 Heatsink fan cable connector 8 HDMI1 HDMI port 9 RJ45 Ethernet port 10 DCIN1 DC-in port 11 CPU1 CPU socket