HP Xw8400 HP xw8400 Workstation - Service and Technical Reference Guide - Page 45

FailSafe Boot Block ROM, If a setup password has been established - 4 beeps

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FailSafe Boot Block ROM The FailSafe Boot Block ROM allows for system recovery in the unlikely event of a ROM flash failure, for example, if a power failure occurs during a ROM upgrade. The Boot Block is a flash-protected section of the ROM that checks for a valid system ROM flash when the system is powered on. ● If the system ROM is valid, the system starts normally. ● If the system ROM fails the validation check, the FailSafe Boot Block ROM provides enough support to start the system from a ROMPaq diskette, which will program the system ROM with a valid image. NOTE: Some models also support recovery from a ROMPaq CD. ISO ROMPaq images are included with selected models in the downloadable ROM SoftPaq. Recovery from USB devices is also supported When the Boot Block detects an invalid system ROM, the System Power LED blinks red eight times, once every second, followed by a two-second pause. Also, you will hear eight beeps that correspond to the blinks. A Boot Block recovery mode message is displayed on the screen (some models). To recover the system after it enters Boot Block recovery mode: 1. If there is a diskette in the diskette drive or a CD in the CD drive, remove the diskette and CD, and power down the system. 2. Insert a ROMPaq diskette into the diskette drive, or if permitted on this workstation, insert a ROMPaq CD into the CD drive. USB media such as an HP DriveKey can also be used. 3. Power on the workstation. If no ROMPaq diskette or ROMPaq CD is found, you will be prompted to insert one and restart the workstation. If a setup password has been established, the Caps Lock light illuminates and you are prompted to enter the password. 4. Enter the setup password. If the system successfully starts from the diskette and successfully reprograms the ROM, then the three keyboard lights illuminate. A rising tone series of beeps also signals successful completion. 5. Remove the diskette or CD, and restart the system. The following table lists the various keyboard light combinations used by the Boot Block ROM (when a PS2 keyboard is attached to the workstation) and explains the meaning and action associated with each combination. Table 3-2 Keyboard light combinations used by Boot Block ROM Light State Description FailSafe Boot Block Mode Keyboard LED Activity State/Message Num Lock On ROMPaq diskette or ROMPaq CD not present, is bad, or drive not ready Caps Lock On Enter password Num, Caps, Scroll Lock Blink On in sequence, Keyboard locked in network mode one at a time-N,C, SL Num, Caps, On Scroll Lock Boot Block ROM Flash successful. Diagnostic lights do not flash on USB keyboards. ENWW Desktop management 35

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FailSafe Boot Block ROM
The FailSafe Boot Block ROM allows for system recovery in the unlikely event of a ROM flash failure,
for example, if a power failure occurs during a ROM upgrade. The Boot Block is a flash-protected section
of the ROM that checks for a valid system ROM flash when the system is powered on.
●
If the system ROM is valid, the system starts normally.
●
If the system ROM fails the validation check, the FailSafe Boot Block ROM provides enough support
to start the system from a ROMPaq diskette, which will program the system ROM with a valid image.
NOTE:
Some models also support recovery from a ROMPaq CD. ISO ROMPaq images are included
with selected models in the downloadable ROM SoftPaq. Recovery from USB devices is also supported
When the Boot Block detects an invalid system ROM, the System Power LED blinks red eight times,
once every second, followed by a two-second pause. Also, you will hear eight beeps that correspond
to the blinks. A Boot Block recovery mode message is displayed on the screen (some models).
To recover the system after it enters Boot Block recovery mode:
1.
If there is a diskette in the diskette drive or a CD in the CD drive, remove the diskette and CD, and
power down the system.
2.
Insert a ROMPaq diskette into the diskette drive, or if permitted on this workstation, insert a
ROMPaq CD into the CD drive. USB media such as an HP DriveKey can also be used.
3.
Power on the workstation.
If no ROMPaq diskette or ROMPaq CD is found, you will be prompted to insert one and restart the
workstation.
If a setup password has been established, the Caps Lock light illuminates and you are prompted
to enter the password.
4.
Enter the setup password.
If the system successfully starts from the diskette and successfully reprograms the ROM, then the
three keyboard lights illuminate. A rising tone series of beeps also signals successful completion.
5.
Remove the diskette or CD, and restart the system.
The following table lists the various keyboard light combinations used by the Boot Block ROM (when a
PS2 keyboard is attached to the workstation) and explains the meaning and action associated with each
combination.
Table 3-2
Keyboard light combinations used by Boot Block ROM
Light
State
Description
FailSafe Boot
Block Mode
Keyboard LED Activity
State/Message
Num Lock
On
ROMPaq diskette or ROMPaq CD not present, is bad, or drive not ready
Caps Lock
On
Enter password
Num, Caps,
Scroll Lock
Blink On in sequence,
one at a time—N,C, SL
Keyboard locked in network mode
Num, Caps,
Scroll Lock
On
Boot Block ROM Flash successful.
Diagnostic lights do not flash on USB keyboards.
ENWW
Desktop management
35