====================================================================== Title: Boot Block Recovery Procedure - Packard Bell PB450 Motherboard ---------------------------------------------------------------------- Filename: PB450REC.TXT WWW URL: http://www.firmware.com/pb4ts/pb450rec.htm FTP URL: ftp://ftp.firmware.com/text/pb450rec.txt Author: Terry Slade, Micro Firmware Technical Support Revision: 04/29/97 Summary: Instructions for boot block recovery procedure used to replace BIOS in flash chip on PB450 motherboard. ====================================================================== The Packard Bell PB450 motherboard is identified by a Socket 3 ZIF socket, 2 72-pin SIMM slots at the front of the board, an OPTi 82C802 chipset, a Cirrus Logic video chip, and 2 brown VL-Bus slot connectors, used to support an ISA or PCI riser card. The boot block procedure is normally used only if the BIOS is corrupt or not present in the flash chip, resulting in a blank screen on powerup. The procedure requires a valid recovery disk, normally created during installation of a flash BIOS upgrade. A recovery disk is available on our FTP site and BBS in the form of a self-extracting diskette image. The filename is PB450RD.EXE. This self-extracting ZIP file contains image files for both Phoenix 4.03 and 4.05 versions of the the PB450 BIOS. . 1. Turn system off 2. Move boot-block jumper J17 (labeled Jbbe) to pins 1-2. (J17 is located just in front of the power supply connector, in the back right corner of the board). 3. Insert recovery disk. 4. Turn system on. There will be a long beep followed by 2 sort beeps. The the diskette drive light will come on. The speaker will beep once more. Diskette access light will remain on, there will be nothing on the display screen. 30 to 60 seconds later, the speaker will beep 4 times to indicate process is finished. 5. Turn system off, remove diskette. (If diskette is left in drive and allowed to boot - the flash chip will be wiped out and process must be repeated). 6. Move jumper J17 (Jbbe) back to pins 2-3. 7. Turn system on, setup CMOS. . 3 repeating beeps indicates no diskette in drive. If any disk besides a valid recovery disk is in the diskette drive, the drive light will go out and there will no beeps after the initial long and two short beeps. # ====================================================================== ====================================================================== Micro Firmware Technical Support ---------------------------------------------------------------------- Voice 405-321-8333 email support@firmware.com Fax 405-321-8342 WWW http://www.firmware.com BBS 405-573-5538 FTP ftp://ftp.firmware.com Sales 800-767-5465 CIS GO PCVEND Section 8 ====================================================================== (c) 1997 Micro Firmware, Inc.