HP d538 nly, LED, E49, J20, J21, J22, J30, J40, P10, P11, P14, P16, P20, P21, P23, P27, P29, P30, P31, P54, P70, J23, P30, J24, IRQ, IRQ, LED, Off, Off, Red, Red

System Board Connectors and Jumpers (position of some untitled components may vary in location)

Keyboard Diagnostic LEDs, PS/2 Keyboards O			nly
LED	Color	LED Activity	State/Message
Num, Caps,	Green	On (Rising Tone)	ROM reflashed successfully
Scroll Lock
Num Lock	Green	On	ROMPaq diskette not present, is bad, or drive
			not ready.*
Caps Lock	Green	On	Enter password.
Num, Caps,	Green	Blink On in sequence, one at a Keyboard locked in network mode
Scroll Lock		time - N, C, SL

*Insert valid ROMPaq diskette in drive A. Turn power switch off, then on to reflash ROM. If ROM flash is successful, all three keyboard LEDs will light up, and you will hear a rising tone series of beeps. Remove diskette and turn power off, then on to restart the computer. For more information about flashing the ROM, refer to the Troubleshooting guide.

Clearing CMOS*

The computer's configuration (CMOS) may occasionally be corrupted. If it is, it is necessary to clear the CMOS memory using switch SW50.

To clear and reset the configuration, perform the following procedure:1.Prepare the computer for disassembly.

ÄCAUTION: The power cord must be disconnected from the power source before pushing the Clear CMOS

Button (NOTE: All LEDs on the board should be OFF). Failure to do so may damage the system board

2.	Remove the access panel.
3.	Press the CMOS button located on the system board and keep it depressed for 5 seconds.
4.	Replace the access panel.

E49	Password jumper
J20	PCI slot 1
J21	PCI slot 2
J22	PCI slot 3
J30	PCI slot extender
J40	AGP slot
P1	Main power (20 pin)
P3	CPU regulator power (4 pin)
P5	Front panel
P6	Internal chassis speaker
P7	CD audio in
P8	Chassis fan
P10	Diskette drive
P11	Aux audio in
P14	Boot block
P16	Power supply fan control
P20	Primary IDE

P21	Secondary IDE
P23	Front audio/USB
P27	Miulti Bay
P29	SCSI LED
P30	Primary Serial ATA (SATA) Port
P31	Secondary Serial ATA (SATA) Port
P54	Serial Port “B”
P70	CPU fan
P124	Hood lock
P125	Hood sensor
SW50	CMOS button
XBT1	Battery
XMM1	Memory socket
XMM2	Memory socket
XMM3	Memory socket
XMM4	Memory socket
XU100	Security

5. Turn the computer on and run F10 Computer Setup (Setup-utility) to reconfigure the system.

*When the CMOS button is pushed or the jumper is removed, both the power-on password and the setup password become invalid because both are stored in the configuration memory. You will need to reset the passwords.

Disabling or Clearing the Power-On and Setup Passwords*

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

2.Remove the access panel.3.Locate the header and jumper labeled E49.

4.Remove the jumper from pins 1 and 2. Place the jumper over pin 2 only, in order to avoid losing it.

5.Replace the access panel.6.Plug in the computer and turn on power. Allow the operating system to start.

NOTE: Placing the jumper on pin 2 clears the current passwords and disables the password features.

7.To re-enable the password features, repeat steps 1-3, then replace the jumper on pins 1 and 2.

8.Repeat steps 5-6, then establish new passwords.

Refer to the Computer Setup (F10 Setup) instructions to establish new passwords.

*When the CMOS button is pushed or the jumper is removed, both the power-on password and the setup password become invalid because both are stored in the configuration memory. You will need to reset the passwords.

Computer Setup (F10) Utility Features (not all features may be available)

File	System Information	Save to Diskette	Ignore Changes and Exit
	About	Restore From Diskette	Save Changes and Exit
	Set Time and date	Set defaults and Exit
Storage	Device Configuration	IDE DPS Self-Test	SCSI Narrow Termination
	Options	Controller Order	Boot Order
	Setup Password	Smart Sensor	Restore Master Boot Record
Security	Power-On Password	DriveLock	Device Security
	Password Options	Master Boot Record Security	Network Service Boot
	Smart Cover	Save Master Boot Record	System IDs
Advanced	Power-On Options	PCI Devices	Devise Options
	Onboard devices	Bus Options	PCI VGA Configuration

Note: See Computer Setup (F10) Utility Guide on the Documentation Library CD.Interchangeable Heatsinks

PCI Extender Card Connectors and Jumpers

J23	PCI slot 4			P30	Male expansion plug
J24	PCI slot 5
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

Computer Diagnostic LEDs (on front of computer)

LED	Color	LED Activity	State/Message
Power	Green	On	(S0)	Computer on
Power	Green	1 blink every 2 seconds	(S1)	Suspend Mode
Power	Green	1 blink every 2 seconds	(S3)	Suspend to RAM
Power	Green	Off	(S4)	Suspend to Disk (if applicable)
Power	Clear	Off	(S5)	Computer off
Power	Red	1 blink followed by 2-second	Power Supply failure
		pause - Repeat
Power	Red*	2 blinks 1 second apart	CPU thermal shutdown
Power	Red*	3 blinks 1 second apart	CPU not installed
Power	Red*	4 blinks 1 second apart	Power supply overload ( crow bar)
Power	Red*	5 blinks 1 second apart	No memory
Power	Red*	6 blinks 1 second apart	No graphics
Power	Red*	7 blinks 1 second apart	System board failure (detected prior to video)
Power	Red*	8 blinks 1 second apart	Invalid ROM
Hard Drive	Green	Blinking	Hard drive activity

Heat Sink Removal

*Blinking codes are repeated after a 2 second pause.