Acer Aspire S7-391 Service Manual

Also see for Aspire S7-391: User manual User manual Quick guide

Contents

Acer Aspire S7-391 Service Manual Manual pdf 164 page image

5-6 Jumper and Connector Locations13. Turn on the computer and press F2 during bootup to access the Setup Utility. If nopassword prompt appears, the BIOS passwords have been cleared. If the promptappears, repeat steps 2-13 until the BIOS passwords have been cleared.14. Press F9 to load the system defaults.15. Press F10 to save the changes you made and close the Setup Utility.BIOS Recovery 0Boot Block 0An interruption during a BIOS flash procedure (e.g. a power outage) can corrupt the BIOScode, which will cause the system to go into an unbootable state. The BIOS boot block refersto a special BIOS program that can be used to boot up a system with minimum BIOSinitialization.You need to access and execute the boot block to reboot the computer andrecover the regular BIOS code.Creating the Crisis Disk 0NOTE:NOTE:The BIOS crisis recovery disk should be prepared in a computer running the WindowsXP, Vista, WIN 7 or 8 OS.1. Prepare a removable USB flash drive.2. Transfer the HeliumX64.fd file in the USB flash drive’s root directory.3. Eject and reconnect the USB flash drive from the computer.Performing a BIOS recovery 0NOTE:NOTE:Make sure the battery pack is installed to the system and that the computer isconnected to a UPS unit during the BIOS recovery process.The function hotkey sequence Fn+Esc is used to enable the BIOS recovery process whensystem is powered On during BIOS POST. If this function is enabled, the system will force theBIOS to execute the boot block program.To perform a BIOS recovery:1. Shut down the BIOS failed-computer.2. Connect the USB flash drive containing the Crisis Recovery disk files to the computer.3. Press and hold the Fn+Esc keys, then press the power button .The BIOS recovery process begins. When the process is complete the computer willautomatically reboot.4. Disconnect the USB flash drive from the computer.5. Perform a BIOS flash procedure to update the BIOS firmware. Refer to the “BIOS FlashUtilities” section on page 2-13 for detailed instructions.