HP Slim Tower PC Failsafe Boot Block ROM, Security Functions, Security Features, Diagnostic Functions, Error Conditions and Messages, Boot Block Recovery, Changing a password:

Failsafe Boot Block ROM

The computer comes with a reprogrammable flash system ROM (read only memory). To upgrade the ROM, download the latest ROM BIOS image from the HP Web site (www.hp.com) and follow the online GUI/instructions.

All ROM BIOS images from HP are digitally signed to ensure authenticity and minimize potential corruption. Your system ROM includes a Failsafe Boot Block that is protected during the flash process and allows the computer to be restarted in the unlikely event of an unsuccessful ROM flash.

If the system detects an invalid system ROM during the boot sequence the system will search for a bootable device. To recover from the Boot Block recovery mode complete the following steps:

Boot Block Recovery

1.Remove any bootable media from the computer and turn off power.

2.Insert a bootable diskette, or CD containing the ROM BIOS.

3.Turn on power to the system.

4.The system will automatically flash the ROM, load the BIOS default, and then boot to the operating system.

Security Functions

The system offers a single supervisor password for system and data protection.

The password, if established, protects the computer from unauthorized access by prompting the user for a password during power up. The password, if established, protects the computer from unauthorized or inadvertent re-configuration by prompting the user for a password prior to entering the Setup Utility.

Establishing a password:

1.Turn on or restart the computer. If you are in Windows, click Start > Shut Down > Restart the computer.

2.When the F10 Setup message appears in the lower-right corner of the screen, press the F10 key. Press Enter to bypass the title screen, if necessary. If you do not press F10 when prompted, a restart will be necessary.

3.Select Password Option, then select Change Supervisor Password and follow the instructions on the screen. You may also want to establish the Password check at this time. This will allow you to specify when the password will be required.

4.Before exiting, click File > Save Changes and Exit.

Changing a password:

1.Turn on or restart the computer. If you are in Windows, click Start > Shut Down > Restart the Computer. To change the setup password, run Computer Setup.

2.When the key icon appears, type your current password, a slash (/) or alternate de-limiter character, your new password, another slash (/) or alternate delimiter character, and your new password again as shown:

current password/new password/new password.

NOTE: Type the new password carefully since the actual characters do not appear on the screen.

3.Press the enter key.

The new password will take effect the next time the computer is restarted.

Deleting a password

1.Turn on or restart the computer. If you are in Windows, click Start > Shut Down > Restart the Computer. To delete the setup password, run Computer Setup (F10).

2.When the key icon appears, type your current password followed by a slash (/) or alternate delimiter character as shown. Example: currentpassword/

3.Press the Enter key.

Clearing CMOS

1.Shut down the system and disconnect the power cord from the power outlet.

2.Remove the chassis access panel.

3.On the system board, move the CMOS jumper from pins 2-3 to pins 1-2

4.Allow the jumper to remain in that position for at least 5 seconds then, return the jumper to pins 2-3.

5.Replace the chassis access panel and reconnect the power cord.

6.Turn on the computer and allow it to start.

Security Features

		How It Is
Feature	Purpose	Established
Floppy drive con-	Prevents the transfer of data to or from the	Setup Utilities
troller	floppy drive.
Device Boot Dis-	Prevents booting from and or all of these	Setup Utilities
abling	devices: Internal or external USB, Internal
	ODD, or Internal FDD
Security Option	Prevents use of computer until password is	Setup Utilities
	entered. Can apply to both initial startup
	and restart.
BIOS Write Pro-	Restricts ability to change ROM BIOS	Setup Utilities.
tect	without approval.
USB Controller	Allows you to disable or enable all USB	Setup Utilities
	devices.

Diagnostic Functions

Diagnostic functions are provided by the Setup Utility (in system ROM) and by Insight Diag- nostics. Insight Diagnostics provides detailed system information including:

•Processor type and speed

•Memory amount, mapping, and integrity

•Hardware peripheral availability/settings

•Hard drive type, space used/available

•System identification, asset tracking

Insight Diagnostics may be pre installed on some models and can be downloaded free of charge from www.hp.com.

Error Conditions and Messages

Chassis Diagnostic LEDs

Power LED	Event
Steady green	System on (normal operation)
Steady green for 3 seconds	System overheating.
followed by a 1 second pause
Blinks green @ 0.5 Hz	Suspend to RAM (some models)
Blinks green @ 0.5 Hz	Normal Suspend
Off (clear)	Computer off
Blinks green 5 times @ 1 Hz *	Memory not seated / installed
Blinks green 6 times @ 1 Hz *	Graphics card error
Blinks green 8 times @ 1 Hz*	Invalid ROM
NOTE:
* Repeated after 2 second pause

Common POST Error Messages

Screen Message	Probable Cause	Recommended Action
Parity Error	Fatal memory parity error.	Reseat memory modules.
	System halts after	Replace memory modules
	displaying this message.
... Master/... Slave	(Primary/Secondary)	Reseat the device data and power
Hard Disk Error	Master/Slave hard drive	cables.
	could not be initialized by	Replace the device data cable.
	the BIOS.	Replace the device.
		Replace the system board.
...Master/Slave	Device configured as a	Replace the device.
Drive — ATAPI	(Primary/Secondary)	Replace the system board.
Incompatible	Master/Slave failed an
	ATAPI compatibility test.
SMART capable	BIOS unable to send a	Backup the data on the hard drive.
but Command	SMART message to the	Replace the hard drive.
Failed.	device.
SMART
Command Failed
SMART status	SMART capable hard drive	Backup the data on the hard drive.
Bad, Backup and	detects an imminent failure.	Replace the hard drive.
replace.
SMART Capable
and Status Bad.
DMA-1 Error	Error when initializing the	Reconnect the cables on the
DMA-2 Error	DMA controller.	peripheral device.
DMA Controller		Replace the data cable.
Error		Replace the device.
		Replace the system board.
Checking	BIOS could not write to the	Change system board jumper JP2 to
NVRAM...Update	NVRAM block.	pins 2-3, then flash the system
Failed		BIOS. Reset jumpers to 1-2.
		Replace the system board.
NVRAM Ignored	NVRAM data used to store	Restart computer, access Computer
or NVRAM Bad	plug and play data was not	Setup. Select Load Default
	used for system	Settings > Save and Exit.
	configuration in POST.	Change system board jumper JP2 to
		pins 2-3, then flash the BIOS. Reset
		jumpers to 1-2.
NVRAM	Error detected while	Restart the computer, use the F10
Checksum Bad,	validating NVRAM data.	Key to access Computer Setup,
NVRAM Cleared		Select Load Default Settings >
		Save and Exit.
Microcode Error	BIOS could not find or load	Ensure the system board BIOS
	CPU microcode to update	supports the processor.
	the CPU.	Change system board jumper JP2 to
		pins 2-3, then flash the BIOS. Reset
		jumpers to 1-2.

NOTE:

For more information about Setup Utilities refer to the Computer Setup Menu on the previous page or in the Service Reference Guide.