HP DX2300 manual Failsafe Boot Block ROM, Password Security, Diagnostic Functions

System Hardware Interrupts

IRQ	System Function	IRQ	System Function
0	Timer Interrupt	8	Real-Time Clock
1	Keyboard	9	Unused
2	Interrupt Controller Cascade	10	Unused, available for PCI
3	Serial Port (COM B)	11	Unused, available for PCI
4	Serial Port (COM A)	12	Mouse
5	Unused, available for PCI	13	Coprocessor
6	Diskette Drive	14	Primary ATA (IDE) Controller
7	Parallel Port (LPT 1)	15	Secondary ATA (IDE) Controller

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.

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 Failsafe Boot Block attempts to locate a valid BIOS image on removable media. 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 flash drive or CD containing the ROM BIOS.

3.Turn on power to the system.

4.The system will automatically flash the ROM. After a successful flash, the system will either automatically restart or prompt the user to unplug the unit, wait 5 seconds, reattach the power cord, and then press the power button.

Password Security

Establishing a Supervisor Password:

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

2.As soon as the computer is turned on, press F10 when the monitor light turns green to enter Computer Setup. Press Enter to bypass the title screen, if necessary. If you do not press F10 when prompted, a restart will be necessary.

3.Select Boot > Setup Supervisor Password and follow the instructions on the screen.

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

Establishing a User Password:

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

2.As soon as the computer is turned on, press F10 when the monitor light turns green to enter Computer Setup. Press Enter to bypass the title screen, if necessary. If you do not press F10 when prompted, a restart will be necessary.

3.Select Boot > Set User Password and follow the instructions on the screen.

Before exiting, click File > Save and Exit Setup.

Changing a Password:

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

2.As soon as the computer is turned on, press F10 when the monitor light turns green to enter Computer Setup.

3.When the key icon appears, type your current password.

4.Select Boot > Set Supervisor (or user) Password.

5.Enter the new password (or nothing for no password) in the key icon and press Enter.

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.

2.As soon as the computer is turned on, press F10 when the monitor light turns green to enter Computer Setup.

3.When the key icon appears, type your current password.

4.Select Boot > Set Supervisor (or user) Password.

5.Enter nothing for no password in the key icon and press Enter.

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

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 found on the Documentation and Diagnostics CD that shipped with the computer. The tool may also be downloaded from the hp Web site using the following pro- cedure:

1.Go to www.hp.com

2.Click the Software and Download driver link.

3.Enter the product number (for example, dx2250) in the text box and press the Enter key.

4.Select the specific product.

5.Select the OS.

6.Click the Diagnostics link.

7.Select HP Insight Diagnostics Offline Edition.

8.Select the proper language and click Download.

Error Conditions and Messages

					How It Is
Feature			Purpose		Established
Floppy drive controller			Prevents the transfer of data to or from the		Setup Utilities
			floppy drive.
Device Boot Disabling			Prevents booting from and or all of these		Setup Utilities
			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 Protect			Restricts ability to change ROM BIOS with-		Setup Utilities.
			out approval.
USB Controller			Allows you to disable or enable all USB		Setup Utilities
			devices.
Diagnostic LEDs
LED	Color	LED Activity		State/Message
Power	Green	On		Computer on
Power	Green	1 blink every 2 seconds		Suspend to RAM (some models)
Power	Green	1 blink every second		CPU thermal shutdown
Power	Green	5 blinks, 1 blink every second		Pre-video memory error
		followed by 1 short beep
Power	Green	6 blinks, 1 blink every second		Pre-video graphics error
		followed by a 1 long and 2 short
		beeps
Power	Green	8 blinks, 1 blink every second		Invalid ROM based on Checksum with
		followed by 2 short beeps		FDD installed
Power	Green	8 blinks, 1 blink every second		Invalid ROM based on Checksum with-
		followed by 2 short beeps and		out FDD installed
		hurried beeps
none	none	System does not power on and		System unable to power on
		LEDs are not flashing

Clearing CMOS

1.Turn off the computer and any external devices, disconnect the power cord from the power outlet, and remove the access panel.

2.Locate jumper JBAT1 and move the jumper from pins 2-3 to pins 1-2.

3.Leave the jumper on pins 1-2 for 5 seconds then, move the jumper back to pins 2-3.

4.Replace the access panel and connect the power cord to the power outlet.

5.Turn on the computer, allow it to start.

dx2300, dx2308 Illustrated Parts & Service Map, MT Chassis 443233-001 page 4