Acer Aspire 5740 Service Guide
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Chapter 5103 Clearing Password Check and BIOS Recovery This section provides the standard operating procedures for clearing the password and BIOS recovery for the system. There is one Hardware Open Gap on the main board for clearing the password check and one Hotkey for enabling BIOS Recovery. Clearing Password Check Hardware Open Gap Description Hardware Gap Position on the Main Board Gap name in Aspire 5740/5740D/5340 Series is G77. Steps for Clearing BIOS Password Check If the user sets the BIOS Password (Supervisor Password and/or User Password) for a security reason, the BIOS will ask for the password during system POST or when the system enters into the BIOS Setup menu. If it is necessary to bypass the password check, the user needs to short the hardware gap to clear the password by following these steps: • Power off the system, and remove the HDD, AC adapter and battery from the computer. • Open the back cover of the computer and look for the hardware gap on the main board as shown in the picture(s) above. • Use an electric conductivity tool to short the two points of the hardware gap. • Plug in the AC adapter while retaining the short condition on the hardware gap. Press the power button to turn on the computer until the BIOS POST routine is finished. Finally, remove the tool from the hardware gap. • Restart the system. Press the F2 key to enter BIOS Setup menu. Hardware Default Setting Operation Description Gap Open (Normal) Short (Clearing Password Check)
104Chapter 5 • If there is no password request, the BIOS Password is cleared. Otherwise, repeat the steps above and try again. NOTE: The steps are only for clearing the BIOS password (Supervisor Password and User Password). BIOS Recovery by Crisis Disk BIOS Recovery Boot Block BIOS Recovery Boot Block is a special block of the BIOS. It is used to boot up the system with minimum BIOS initialization. Users can enable this feature to restore the BIOS firmware to a successful one once the previous BIOS flashing process failed. BIOS Recovery Hotkey The system provides a function hotkey: Fn+Esc, for enabling the BIOS Recovery process at system power-on during BIOS POST. To use this function, the AC adapter and the battery must be connected. If this function is enabled, the system will force the BIOS to enter a special BIOS block called Boot Block. Steps for BIOS Recovery by Crisis Disk Before doing this, prepare a Crisis Disk (refer to the “Steps for Creating the Crisis Disk in Windows XP/Vista” section below) and keep it ready in hand. Follow these steps for BIOS recovery: 1.Power off the system. 2.Connect a removable USB storage device containing the Crisis Disk to a USB port connected to the BIOS flash failed system. 3.Under power-off state, press and hold Fn+Esc and then press the power button. The system should be powered on with the Crisis BIOS Recovery process. 4.BIOS Boot Block starts to restore the BIOS code from the Crisis Disk to BIOS ROM on the failed system. 5.After the crisis flashing process is finished, the system will restart. After the Crisis Recovery process is finished, the system should have a successful and workable BIOS after power on. The user can then update the latest BIOS version for this system using the regular BIOS flashing process. Creating the Crisis Disk in Windows Follow these steps to create the Crisis Disk: 1.Prepare a removable USB storage device (size greater than 10MB). Note that all data on the USB storage device will be cleared during the creation of the Crisis Disk. 2.Set up another computer loaded with the same Windows operating system.
Chapter 5105 3.Decompress the Crisis Package Source. Select WINCRIS.EXE and then select Run as administrator under Windows. 4.Keep the default settings and then click on the Start button. 5.When the pop-up warning dialog box appears, press OK to continue creating the Crisis Disk.
106Chapter 5 6.The Crisis Disk will be created after a few seconds. 7.Press No if you do not want to create another Crisis Disk.
Chapter 5107 8.Reconnect the USB removable storage device and check if it contains the 3 files shown in the following figure.
Chapter 6109 This chapter gives you the FRU (Field Replaceable Unit) listing in global configurations of Aspire 5740/5740D/ 5340 Series. Refer to this chapter whenever ordering for parts to repair or for RMA (Return Merchandise Authorization). Please note that WHEN ORDERING FRU PARTS, you should check the most up-to-date information available on your regional web or channel. For whatever reasons a part number change is made, it will not be noted on the printed Service Guide. For ACER AUTHORIZED SERVICE PROVIDERS, your Acer office may have a DIFFERENT part number code from those given in the FRU list of this printed Service Guide. You MUST use the local FRU list provided by your regional Acer office to order FRU parts for repair and service of customer machines. NOTE: •To scrap or to return the defective parts, you should follow the local government ordinance or regulations on how to dispose it properly, or follow the rules set by your regional Acer office on how to return it. FRU (Field Replaceable Unit) List Chapter 6
Chapter 6111 FRU List Aspire 5740/5740D/5340 Series FRU List 1. ACER_ASPIRE 5740 UMACBB_JV50_CP (NO: LX.PM902.064/88 ) CategoryNo.Part Name and DescriptionAcer Part No. ADAPTER 1ADAPTER 65W 19V 3PIN DELTA ADP-65JH DB A LV5 LED LF YELLOWAP.06501.026 1ADAPTER 65W 19V 3PIN LITEON PA-1650-22AC LV5 LED LF YELLOWAP.06503.024 1ADAPTER 65W 19V 3PIN HIPRO HP-A0652R3B 1LF LV5 LED LF YELLOWAP.0650A.012 BATTERY 1BATTERY SANYO AS-2007A LI-ION 3S2P SANYO 6 CELL 4400MAH MAIN COMMON NORMAL TYPEBT.00603.041 1BATTERY SONY AS-2007A LI-ION 3S2P SONY 6 CELL 4400MAH MAIN COMMON NORMAL TYPEBT.00604.024 1BATTERY PANASONIC AS-2007A LI-ION 3S2P PANASONIC 6 CELL 4400MAH MAIN COMMON PSSBT.00605.020 1BATTERY SIMPLO AS-2007A LI-ION 3S2P PANASONIC 6 CELL 4400MAH MAIN COMMON PSSBT.00607.015 1BATTERY SIMPLO AS-2007A LI-ION 3S2P LGC 6 CELL 4400MAH 2ND COMMONBT.00607.019 1BATTERY SIMPLO AS-2007A LI-ION 3S2P SAMSUNG 6 CELL 4400MAH MAIN COMMON SDI 2.2MAH F TYPEBT.00607.034 BOARDS 1BLUETOOTH BOARD FOXCONN BRM 2046 BT2.1 T60H928.33 F/W:861BH.21100.004 1 LED BUTTON BOARD55.4GD07.001 G 2MODEM BOARD FOXCONN DELPHI-AM5 V2H 1.5_3.3V AUS T60M951.36FX.22500.023 2MODEM BOARD LITEON CONEXANT -UNIZION 1.5_3.3V AUS B85247600GFX.22500.021 1 TOUCHPAD BOARD SYNAPTICS TM00540-005 56.ATR01.001 1 TOUCH PAD BUTTON BOARD 55.PAW01.003 1 USB BOARD55.4GD06.001 G
11 2Chapter 6 1WIRELESS LAN BOARD FOXCONN ATHEROS XB63 MINICARD B/GNI.23600.062 1WIRELESS LAN BOARD QMI ATHEROS HB93 1X2 BGN HM EM306NI.23600.064 1WIRELESS LAN BOARD FOXCONN 802.11BGN BCM 43225 2X2 BGN (HM) T77H103.00NI.23600.066 CABLES 1BLUETOOTH BOARD CABLE 50.PAW01.004 1FINGER PRINT / TP BUTTON BAORD CABLE 50.PAW01.003 2LED BUTTON BOARD CABLE 50.4CG02.001 2LED BUTTON BOARD CABLE 50.4GD01.001 2LED LCD/CAMERA CABLE 50.4CG02.011 2LED LCD/CAMERA CABLE 50.4GD01.011 2MODEM CABLE 50.4CG04.001 2MODEM CABLE 50.4CG04.011 CABLES1 POWER CORD 10A 250V ARGENTINE 27.01518.0U1 1 POWER CORD 10A 125V US 27.T30V1.001 1 POWER CORD 10A 125V 3PIN US BK 27.01518.641 1 POWER CORD 7A 250V 2PIN KOREAN 27.01518.531 1 POWER CORD 3A 250V 3PIN UK 27.01518.541 1 POWER CORD 5A 250V 3PIN UK BK 27.03118.001 1 POWER CORD 7A 125V 2PIN JAPAN 27.01518.551 1 POWER CORD 10A 3PIN BK DENMARK 27.01518.561 1 POWER CORD 10A 250V 3PIN DENMARK BK 27.01518.671 1 POWER CORD 10A 250V 3PIN BK SOUTH AFRICA 27.01518.571 1 POWER CORD 16A 250V SOUTH AFRICA BK 27.01518.681 1 POWER CORD 10A 250V SWISS 27.01518.581 1 POWER CORD 10A 250V 3PIN SWISS BK 27.01518.691 1 POWER CORD 10A 250V 3PIN CHINA 27.01518.591 1 POWER CORD 10A 250V 3PIN CHINA BK 27.01518.701 1 POWER CORD 250V 3PIN EUR BK 27.T30V1.004 1POWER CABLE 16A 250V 3PIN EUR BK 27.01518.731 1POWER CORD 10A 250V 3PIN ITALY 27.01518.611 1POWER CORD 10A 250V 3PIN ITALY BK 27.01518.711 1POWER CORD 2.5A 250V AUSTRALIA 27.01518.621 1POWER CORD 2.5A 250V SOUTH AFRICA BK (INDIA) 27.01518.631 1POWER CORD 10A 250V SOUTH AFRICA BK (INDIA) 27.01518.721 1POWER CORD 7A 125V 2PIN JAPAN BK 27.01518.661 1POWER CORD 250V 10A 3PIN ISRAEL 27.01518.761 1POWER CORD 2.5A 125V USA 27.01518.781 1POWER CORD 2.5A 125V 1.8M BLACK TAIWANESE 27.01518.A11 1POWER CORD 10A 250V 1.8M BRAZIL BLK 27.01518.A41 1POWER CORD ACA / ACNZ 27.03218.021 CategoryNo.Part Name and DescriptionAcer Part No.