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Failsafe Boot Block ROM
Error Conditions and Messages
The computer comes with a reprogrammable flash system ROM (read only memory). To
How It Is
upgrade the ROM, download the latest ROM BIOS image from the HP Web site (www.hp.com)
Feature
Purpose
Established
and follow the online GUI/instructions.
Floppy drive controller
Prevents the transfer of data to or from the
Setup Utilities
Your system ROM includes a Failsafe Boot Block that is protected during the flash process and
floppy drive.
allows the computer to be restarted in the unlikely event of an unsuccessful ROM flash.
Device Boot Disabling
Prevents booting from and or all of these
Setup Utilities
If the system detects an invalid system ROM during the boot sequence, the Failsafe Boot Block
devices: Internal or external USB, Internal
attempts to locate a valid BIOS image on removable media. To recover from the Boot Block
ODD, or Internal FDD
recovery mode complete the following steps:
Security Option
Prevents use of computer until password is
Setup Utilities
entered. Can apply to both initial startup and
Boot Block Recovery
restart.
1. Remove any bootable media from the computer and turn off power.
BIOS Write Protect
Restricts ability to change ROM BIOS with-
Setup Utilities.
out approval.
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.
USB Controller
Allows you to disable or enable all USB
Setup Utilities
devices.
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.
Diagnostic LEDs
NOTE: BitLocker prevents Windows Vista from booting when a CD containing the BIOS image
LED
Color
LED Activity
State/Message
file is in an optical drive. If BitLocker is enabled, remove this CD before attempting to boot to
Windows Vista.
Power
Green
On
Computer on
Power
Green
1 blink every 2 seconds
Normal Suspend Mode
Password Security
Power
Red
1 blink every second followed
CPU thermal shutdown
by a 2 second pause
Establishing a Setup password:
Power
Red
3 blinks, 1 blink every second
Processor not installed
1. Turn on or restart the computer. If you are in Windows, click Start > Shut Down > Restart.
followed by a 2 second pause
2. As soon as the computer is turned on, press F10 when the monitor light turns green to enter
Power
Red
4 blinks, 1 blink every second
Power failure (power supply overload)
Computer Setup. Press Enter to bypass the title screen, if necessary. If you do not press F10
followed by a 2 second pause
when prompted, a restart will be necessary.
Power
Red
5 blinks, 1 blink every second
Pre-video memory error
3. Select Security > Setup Password and follow the instructions on the screen.
followed by a 2 second pause
4. Before exiting, click File > Save Changes and Exit.
Power
Red
6 blinks, 1 blink every second
Pre-video graphics error
followed by a 2 second pause
Changing a password:
Power
Red
7 blinks, 1 blink every second
System board failure (ROM
1. Turn on or restart the computer. If you are in Windows, click Start > Shut Down > Restart.
followed by a 2 second pause
To change the Setup password, go to step 2.
Power
Red
8 blinks, 1 blink every second
Invalid ROM based on Checksum
To change the Power-on password, go to step 3.
followed by a 2 second pause
2. To change the Setup password, as soon as the computer is turned on, press F10 when the
Power
Red
9 blinks, 1 blink every second
System powers on but is unable to boot
monitor light turns green to enter Computer Setup. Press Enter to bypass the title screen, if
followed by a 2 second pause
necessary.
Power
Red
10 blinks, 1 blink every second Bad option card
3. When the key icon appears, type your current password, a slash (/) or alternate delimiter
followed by a 2 second pause
character, your new password, another slash (/) or alternate delimiter character, and your new
Power
Red
11 blinks, 1 blink every second The current processor does not support
password again as shown:
followed by a 2 second pause
a feature previously enabled on this
system.
current password/new password/new password.
none
none
System does not power on and
System unable to power on
LEDs are not flashing
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.
Common POST Error Messages
Deleting a password
Screen Message
Probable Cause
Recommended Action
1. Turn on or restart the computer. If you are in Windows, click Start > Shut Down > Restart.
101-Option ROM Error
1. System ROM checksum
1. Verify ROM, reflash if required
To delete the Setup password, go to step 2.
error.
2. Remove suspected card, reboot
To delete the Power-On password, go to step 3.
2. Expansion board option
3. Clear CMOS memory, reboot
2. To change the Setup password, as soon as the computer is turned on, press F10 when the
ROM checksum
4. Replace system board
monitor light turns green to enter Computer Setup. Press Enter to bypass the title screen, if
3. System board
necessary.
103-System Board
DMA, timers
1. Clear CMOS memory.
3. When the key icon appears, type your current password followed by a slash (/) or alternate
Failure
delimiter character as shown. Example: currentpassword/
2. Remove expansion boards.
4. Press Enter.
3. Replace system board.
164-Memory Size Error
Incorrect memory configu-
1. Run Setup (F10).
Security Features
and
ration
201-Memory Error
2. Check DIMMs for proper
seating, type, and HP
NOTE: For more information about Setup Utilities refer to the Computer Setup Menu on the
compatibility.
previous page or in the Service Reference Guide.
3. Remove DIMMs singularly and
reboot to isolate faulty DIMM.
Diagnostic Functions
4. Replace system board.
Diagnostic functions are provided by the Setup Utility (in system ROM) and by Insight Diag-
214-DIMM Configura-
Populated DIMM configura- Rearrange the DIMMs so that
nostics. Insight Diagnostics provides detailed system information including:
tion Warning
tion is not optimized
each channel has the same amount
of memory.
•
Processor type and speed
•
Memory amount, mapping, and integrity
301-, 304-Keyboard error
Keyboard failure.
Check keyboard connection or
•
Hardware peripheral availability/settings
keys. Check connector for bent of
missing pins. Replace keyboard. If
•
Hard drive type, space used/available
304, possible system board prob-
•
System identification, asset tracking
lem.
Insight Diagnostics may be found on the Documentation and Diagnostics CD that shipped with
501-Display Adapter
Graphics display controller.
1. Reseat graphics card.
the computer. The tool may also be downloaded from the hp Web site using the following pro-
Failure
2. Clear CMOS.
cedure:
3. Check monitor connection.
1. Go to www.hp.com
4. Replace graphics card.
2. Click the Software & Download driver link.
1720-SMART Hard Drive Hard drive is about to fail.
1. Determine if hard drive is
3. Enter the product number (for example, dc7800) in the text box and press the Enter key.
Detects Imminent Failure
giving correct error message.
4. Select the specific product.
Enter Computer Setup and run
the Drive Protection System
5. Select the OS.
test under Storage > DPS Self-
6. Click the Diagnostics link.
test.
7. Select HP Insight Diagnostics Offline Edition.
2. Apply hard drive firmware
8. Select the proper language and click Download.
patch if applicable.
NOTE: The download includes instructions on how to create a bootable CD.
3. Back up contents and replace
hard drive.
1796-SATA Cabling Error One or more SATA devices
Ensure SATA connectors are used
Clearing CMOS
are improperly attached. For in ascending order. For one
optimal performance, the
device, use SATA 0. For two
1. Turn off the computer and any external devices, and disconnect the power cord from the
SATA 0 and SATA 1 con-
devices, use SATA 0 and SATA 1.
power outlet.
nectors must be used before
For three devices, use SATA 0,
2. Remove the chassis access panel.
SATA 2 and SATA 3.
SATA1, and SATA 2.
3. On the system board, press and hold the CMOS button for 5 seconds.
1801-Microcode Patch
Processor not supported by
1. Upgrade BIOS to proper
Error
ROM BIOS.
version.
4. Replace the chassis access panel and reconnect the power cord.
2. Change the processor.
dc7800 Illustrated Parts & Service Map, SFF Chassis
459786-001
page 4