Acer Aspire V5-571 Acer Aspire V5-531 Notebook Service Guide - Page 196

Performing a BIOS Recovery 0 Boot Block 0 An interruption during a BIOS flash procedure (e.g. a power outage) can corrupt the BIOS code, which will cause the system to go into an unbootable state. The BIOS boot block refers to a special BIOS program that can be used to boot up a system with minimum BIOS initialization.You need to access and execute the boot block to reboot the computer and recover the regular BIOS code. Creating the Crisis Disk 0 NOTE: NOTE: The BIOS crisis recovery disk should be prepared in a computer running the Windows XP, Vista, or 7 OS. 1. Prepare a removable USB flash drive. Note that all data in the USB flash drive will be cleared during the creation of the crisis disk. 2. Set up a computer running the Windows XP, Vista, or 7 operating system and plug in the USB flash drive into an available USB port. 3. Open the Notepad program and create a new file. 4. Type startup.nsh. For example, the USB key prompt is fs0. The PFlash.efi and BIOS.cap files are in the fs0: root directory. Figure 5-6. Startup.nsh File 5. Save this file as startup.nsh in the USB flash drive's root directory. 6. Decompress the Crisis Package Source in the USB flash drive's root directory. 7. Eject and reconnect the USB flash drive from the computer, and make sure it contains the following files: EFI folder BIOS image file BIOS.cap PFlash.efi PFlashX86efi Startup.nsh 5-8 Jumper and Connector Locations