HP Compaq dc5100 MT Reference Manual Download Page 2

Security Functions 

(Continued)

To change a Power-On or Setup password: 

1.

Turn on or restart the computer. If you are in Windows, click 

Start > Shut Down > 

Restart the Computer.

 Run Computer Setup (F10).

When the key icon appears, type your current password, a slash (/) or alternate delimiter charac-
ter, 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.

 

2.

Press 

Enter

.

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

To delete a password using Setup:

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 

Enter

To delete or disable the Power On and Setup passwords: 

1.

Shut down (Power down) the system and disconnect the power cord from the outlet or the 
system unit.

2.

Remove the chassis cover.

3.

On the system board, remove the jumper on pins 1 and 2 of header E49 and place only on 
pin 2. 

4.

Replace the chassis cover and reconnect the power cord.

NOTE: Setup password may be used in place of Power-on password to boot system.

NOTES:
[1] For more information about Setup Utilities refer to the Computer Setup Guide.
[2] If for any reason the Setup utility is not accessible to unlock the Smart Cover Lock 
then a FailSafe key is required to bypass the Smart Cover Lock and open the computer. 
Refer to the Hardware Reference Guide on how to use the FailSafe key. To order a Fail-
Safe key contact HP. 
[3] Available on some models.

Diagnostic Functions

Diagnostic functions are provided by the Setup Utility (in system ROM) and by Diagnostics 
for Windows. Diagnostics for Windows 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

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

Error Conditions and Messages

NOTES:
[1] All LEDs will blink in sync twice, accompanied by 1 long and 3 short beeps
[2] LEDs will blink in sequence (NUM, Caps, then Scroll Lock)
[3] Accompanied by rising beep tone

NOTE: 
[1] Power LED blinks are repeated after a 2 second pause until issue is resolved,. 
Beeps continue for 5 iterations and then stop. 

NOTES:  L = long,  S = short

Security Features

Feature

Purpose

How It Is 

Established

Removable Media 
Boot Control

Prevents booting from removable media 
drives.

Setup Utilities. [1]

Serial, Parallel, 
USB, or Infrared 
Interface Control

Prevents data transfer through integrated 
serial, parallel, USB, or infrared interface.

Setup Utilities. [1]

Power-On 
Password

Prevents use of computer until password is 
entered. Can apply to both initial startup 
and restart.

Setup Utilities. [1]

Setup Password

Prevents reconfiguration of computer until 
password is entered.

Setup Utilities. [1]

Network Server 
Mode

Provides unique security features for 
computer used as server.

Setup Utilities. [1]

DriveLock

Prevents unauthorized access to  data on 
drives supporting password protection.

Setup Utilities. [1]

Smart
Cover Lock [2][3]

Software-controllable solenoid that, when 
activated, prevents unauthorized access to 
chassis interior. 

Setup Utilities. [1]

Smart
Cover Sensor [3]

Indicates computer cover or side panel has 
been removed. Can be set to require 
password for restart after cover or panel 
removal.

Setup Utilities. [1]

Master Boot 
Record (MBR) 
Security

May prevent unintentional or malicious 
changes to MBR of the current bootable 
disk and provides a means of recovering 
“last known” MBR image.

Setup Utilities. [1]

Drive Protection 
System (DPS

Diagnostic tool built into hard drives on 
select models designed to discover 
problems that might result in unwarranted 
drive replacement.

Setup Utilities or 
Diagnostics for 
Windows.

Memory Change 
Alerts

Detects addition or removal of memory 
modules. Notifies system administrator.

Refer to Intelligent 
Manageability 
Guide.

Ownership Tag

Displays ownership information as defined 
by system administrator during system 
startup. (Protected by setup password).

Setup Utilities. [1]

Kensington 
CableLock 
Provision

Inhibits access to interior of computer 
chassis. Can also be used to secure 
computer to a fixed object for prevent theft.

Requires Kensington 
cable lock accessory 
to secure computer 
to a fixed object.

PS/2 Keyboard LED Indications

NUM lock 

LED

Caps Lock 

LED

Scroll Lock 

LED

Event

On

Off

Off

ROMPaq diskette not present, faulty, 
or drive problem

Off

On

Off

Password prompt

Blinking [1]

Blinking [1]

Blinking [1]

Invalid ROM and/or flash failed

Blinking [1]

Blinking [2]

Blinking [2]

Keyboard locked in network mode

On [3]

On [3]

On [3]

Successful ROM flash

Chassis LED and Beep Messages

Power LED

# Beeps

Event

Steady green

None

S0 System on (normal operation)

Blinks green @ 0.5 Hz

None

S1 Suspend

Blinks green @ 0.5 Hz

None

S3 Suspend to RAM

 Off (clear)

None

S4 Suspend to disk

Off (clear)

None

S5 Soft off

Blinks red 2 times @ 1 Hz [1]

2

Processor thermal shutdown

Blinks red 3 times @ 1 Hz [1]

3

Processor not seated / installed

Blinks red 4 times @ 1 Hz [1]

4

Power supply failure

Blinks red 5 times @ 1 Hz [1]

5

Memory error

Blinks red 6 times @ 1 Hz [1]

6

Video error

Blinks red 7 times @ 1 Hz [1]

7

PCA failure

Blinks red 8 times @ 1 Hz [1]

8

Invalid ROM checksum (error)

Blinks red 9 times @ 1 Hz [1]

9

Wrong power supply input voltage

Blinks red10 times @ 1 Hz [1]

10

Bad option card

Common POST Error Messages

Screen 

Message

Beeps

Probable Cause

Recommended Action

101-Option 
ROM Error

1L, 1S

1. System ROM 
checksum error.

2. Expansion card. 

3. CMOS corruption.

4. System board

1. Verify ROM, reflash if 
required.

2. Remove suspected expansion 
card, reboot.

3. Clear CMOS memory, reboot.

4. Replace system board.

102-System 

Board 

Failure

none

DMA, timers

1. Clear CMOS memory.

2. Remove expansion boards.

3. Replace system board.

164-Memory  

Size Error

2S

Incorrect memory 
configuration.

1. Run Setup (F10).

2. Check DIMMs for proper 
seating, proper type, and HP 
compatibility.

3. Remove DIMMs singularly 
and reboot to isolate faulty 
DIMM.

201-Memory 

Error

none

RAM failure

Same as 164.

301-, 304-

Keyboard  

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.

602-Diskette 

Boot Error

none

Diskette in drive A not 
bootable

Remove/replace diskette.

1720-

SMART 

Hard Drive 

Detects 

Imminent 

Failure

none

Hard drive is about to 
fail. 

Run drive protection system test 
if available. Check for firmware 
patch for erroneous error 
message.

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