The jumper at pins 9, 10, and 11 controls whether the system attempts to boot using the BIOS programmed in the boot block area of the FLASH memory. This should be used only if the operational area of the BIOS is corrupted or needs to be upgraded. Contact your local service representative before doing this.
Procedure to disable recovery booting:
1.See “General Procedure to Change Jumper Setting” on page 100.
2.Move the recovery boot jumper from pins 9 and 10 to pins 10 and 11.
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 |
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|
2 | Successful completion, no errors. |
|
|
4 | The system could not boot from the diskette. The diskette may not be |
| bootable. |
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|
Continuous series of low 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 SSU to specify a new password. See Chapter 3.
Boot Block Write Protect JumperThe 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 be done only by a technically qualified person. The procedure requires a special “Boot Block Update Utility.” Contact your dealer or sales representative for more information.
102 | Technical Reference |