Micron Electronics, Inc.
2-9
Chapter 2: Technical Information
Boot Block Write Protect Jumper
The jumper at pins 13, 14, and 15 controls whether the BIOS boot block is
protected from being erased and reprogrammed.
CAUTION, leave boot block jumper at factory-default setting
Programming the boot block incorrectly will prevent the system from booting.
Programming
should only be done
by a technically qualified person. The
procedure requires a special “Boot Block Update Utility.” Contact your dealer
or sales representative for more information.
Procedure to permit boot block erasing and programming:
1.
See “General Procedure to Change Jumper Setting”
on page 2-6.
2.
Move the boot block jumper from pins 13 and 14 to pins 14 and 15 to
erase and program the BIOS boot block.
3.
Reinstall the side cover for your safety, and connect the power cord to
the system.
4.
Run the Boot Block Update Utility.
5.
Turn off the system, and disconnect the power cord from the system.
6.
Remove the side cover.
7.
Move the jumper from pins 14 and 15 back to pins 13 and 14 to write
protect the BIOS boot block.
8.
Reinstall the side cover, and connect the power cord to the system.
3.
Reinstall the side cover for your safety, connect the power cord to the
system.
4.
Turn the system on, and insert the Flash Memory Update Utility diskette
in drive A. After the system boots, the speaker emits a single beep and
the recovery process starts. This takes about three minutes. When the
recovery process completes, the speaker emits two beeps.
While in the recovery mode, there is no screen display on the monitor.
The keyboard is disabled as the system automatically recovers the
BIOS. The following beep codes describe the recovery status.
Beep Code
Message
2
Successful completion, no errors.
4
The system could not boot from the diskette. The
diskette may not be bootable.
Continuous beeps
The wrong BIOS recovery files are being used and/or
the flash memory jumper is in the wrong position.
5.
Turn the system off, disconnect the power cord(s) from the system, and
remove the left side cover.
6.
Move the jumper from pins 9 and 10 to pins 10 and 11 to enable the
normal boot mode.
7.
Replace the left side cover, remove the diskette from drive A, and connect
the power cord(s) to the system.
8.
After running the special recovery mode, run the SCU to specify a new
password. See Chapter 3.
