HP dc7800 tower manual Failsafe Boot Block ROM, Password Security, Error Conditions and Messages

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 in the root directory. The media must be formatted using the FAT12, FAT16, or FAT32 file system.

3.Turn on power to the system.

4.The system will automatically flash the ROM.

NOTE: BitLocker prevents Windows Vista from booting when a CD containing the BIOS image file is in an optical drive. If BitLocker is enabled, remove this CD before attempting to boot to Windows Vista.

Password Security

Establishing a Setup or Power-On 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.To establish a Setup password, select Security > Setup Password and follow the instructions

on the screen. - or -

To establish a Power-On password, select Security > Power-On Password and follow the instructions on the screen

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

Changing a Setup or Power-On password:

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

To change the Setup password, go to step 2.

To change the Power-on password, go to step 3.

2.To change the Setup password, 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.

3.When the key icon appears, type your current password, a slash (/) or alternate delimiter 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 characters do not appear on the screen.

4.Press Enter.

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

Deleting a Power-On or Setup password

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

To delete the Setup password, go to step 2.

To delete the Power-On password, go to step 3.

2.To change the Setup password, 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.

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

4.Press Enter.

Security Features

Diagnostic Functions

Diagnostic functions are provided by the Setup Utility (in system ROM) and by HP Insight Diagnostics. HP 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 & Download driver link.

3.Enter the product number (for example, dc7900) 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.Click Download.

NOTE: The download includes instructions on how to create a bootable CD.

Clearing CMOS

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

2.Remove the chassis access panel.

3.On the system board, press and hold the CMOS button for 5 seconds.

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

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

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	Normal Suspend Mode
Power	Red	1 blink every second followed	CPU thermal shutdown
		by a 2 second pause
Power	Red	3 blinks, 1 blink every second	Processor not installed
		followed by a 2 second pause
Power	Red	4 blinks, 1 blink every second	Power failure (power supply overload)
		followed by a 2 second pause
Power	Red	5 blinks, 1 blink every second	Pre-video memory error
		followed by a 2 second pause
Power	Red	6 blinks, 1 blink every second	Pre-video graphics error
		followed by a 2 second pause
Power	Red	7 blinks, 1 blink every second	System board failure (ROM
		followed by a 2 second pause
Power	Red	8 blinks, 1 blink every second	Invalid ROM based on Checksum
		followed by a 2 second pause
Power	Red	9 blinks, 1 blink every second	System powers on but is unable to boot
		followed by a 2 second pause
Power	Red	10 blinks, 1 blink every second	Bad option card
		followed by a 2 second pause
Power	Red	11 blinks, 1 blink every second	The current processor does not support
		followed by a 2 second pause	a feature previously enabled on this
			system.
none	none	System does not power on and	System unable to power on
		LEDs are not flashing

Common POST Error Messages

Screen Message	Probable Cause	Recommended Action
101-Option ROM Error	1. System ROM checksum	1.	Verify ROM, reflash if required
	error.	2.	Remove suspected card, reboot
	2. Expansion board option	3.	Clear CMOS memory, reboot
	ROM checksum
		4.	Replace system board
103-System Board	DMA, timers	1.	Clear CMOS memory.
Failure		2.	Remove expansion boards.
		3.	Replace system board.
164-Memory Size Error	Incorrect memory configu-	1.	Run Setup (F10).
and	ration	2.	Check DIMMs for proper
201-Memory Error
			seating, type, and HP
			compatibility.
		3.	Remove DIMMs singularly and
			reboot to isolate faulty DIMM.
		4.	Replace system board.
214-DIMM Configura-	Populated DIMM configura-	Rearrange the DIMMs so that
tion Warning	tion is not optimized	each channel has the same amount
		of memory.
301-, 304-Keyboard error	Keyboard failure.	Check keyboard connection or
		keys. Check connector for bent of
		missing pins. Replace keyboard. If
		304, possible system board prob-
		lem.
501-Display Adapter	Graphics display controller.	1.	Reseat graphics card.
Failure		2.	Clear CMOS.
		3.	Check monitor connection.
		4.	Replace graphics card.
1720-SMART Hard Drive	Hard drive is about to fail.	1.	Determine if hard drive is
Detects Imminent Failure			giving correct error message.
			Enter Computer Setup and run
			the Drive Protection System
			test under Storage > DPS Self-
			test.
		2.	Apply hard drive firmware
			patch if applicable.
		3.	Back up contents and replace
			hard drive.
1796-SATA Cabling Error	One or more SATA devices	Ensure SATA connectors are used
	are improperly attached. For	in ascending order. For one
	optimal performance, the	device, use SATA 0. For two
	SATA 0 and SATA 1 con-	devices, use SATA 0 and SATA 1.
	nectors must be used before	For three devices, use SATA 0,
	SATA 2 and SATA 3.	SATA1, and SATA 2.
1801-Microcode Patch	Processor not supported by	1.	Upgrade BIOS to proper
Error	ROM BIOS.		version.
		2.	Change the processor.

dc7900 Illustrated Parts & Service Map, CMT Chassis 506593-002 page 4