dx2250 Illustrated Parts & Service Map, MT Chassis
440318-001
page 4
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 Setup 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
Security > Setup Passwor
d and follow the instructions on the screen.
4. Before exiting, click
File > Save Changes and Exit
.
Establishing a Setup 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
Security > Power-On Passwor
d and follow the instructions on the screen.
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
.
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 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.
4. 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
.
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
.
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
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
Feature
Purpose
How It Is
Established
Floppy drive controller
Prevents the transfer of data to or from the
floppy drive.
Setup Utilities
Device Boot Disabling
Prevents booting from and or all of these
devices: Internal or external USB, Internal
ODD, or Internal FDD
Setup Utilities
Security Option
Prevents use of computer until password is
entered. Can apply to both initial startup and
restart.
Setup Utilities
BIOS Write Protect
Restricts ability to change ROM BIOS with-
out approval.
Setup Utilities.
USB Controller
Allows you to disable or enable all USB
devices.
Setup Utilities
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
Red
1 blink every second followed
by a 2 second pause
CPU thermal shutdown
Power
Red
5 blinks, 1 blink every second
followed by a 2 second pause
Pre-video memory error
Power
Red
6 blinks, 1 blink every second
followed by a 2 second pause
Pre-video graphics error
Power
Red
8 blinks, 1 blink every second
followed by a 2 second pause
Invalid ROM based on Checksum
none
none
1 blink then power shut down
Cannot detect CPU
none
none
System does not power on and
LEDs are not flashing
System unable to power on
Common POST Error Messages
Screen
Message
Beeps
Probable Cause
Recommended Action
103-System
Board
Failure
none
DMA, timers
1. Clear CMOS memory.
2. Remove expansion board.
3. Replace system board.
214-DIMM
Configuration
Warning
none
Populated DIMM configura-
tion is not optimized
Rearrange the DIMMs so that
each channel has the same amount
of memory.
301-, 304-Key-
board error
none
Keyboard failure.
Check keyboard connection or
keys. Replace keyboard. If 304,
possible system board problem.
501-Display
Adapter Failure
1L, 2S
Graphics controller.
1. Reseat graphics card.
2. Check monitor connection.
3. Replace graphics card.
1720-SMART
Hard Drive
Detects Immi-
nent Failure
none
Hard drive is about to fail.
Run drive protection system test if
available. Check for firmware
patch for erroneous error message.
1796-SATA
Cabling Error
none
One or more SATA devices
are improperly attached.
Ensure SATA0 and SATA1 are
used before any other SATA con-
nectors.
1801-Micro-
code Patch
Error
none
Processor not supported by
ROM BIOS.
1. Upgrade BIOS to proper
version.
2. Change the processor.
NOTES: L = long, S = short
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.
