Service and Maintain

HP 505B, MT 635951-001 page 2
System Board
Diagnostic Beep Codes
The Power-On Self-Test (POST) is a series of diagnostic tests that runs automatically when the
computer is powered on. If the POST detects an error, this causes an audible beep code to sound.
The POST beep codes are not necessarily accompanied by an associated, visible error code or
text message.
The following table shows the POST beep codes, their meanings, and the recommended actions
for solving the problem.
Standard and Optional Boards
System boards with thermal grease, alcohol pad, and CPU socket cover
1 System board 616413-001
Memory modules
2 2 GB, PC3-10600
629026-001
576110-001
2 1 GB, PC3-10600
629025-001
576109-001
Other boards
* LSI 56K modem, PCIe 490689-001
* HP Wireless 802.11b/g/n WLAN card 538048-001
* 802.11b/g/n WLAN card, for use in ROW 498307-001
* ATI Radeon HD4350 (RV710) PCIe x16 graphics card, 512 MB 586750-001
* ATI Radeon HD5450 PCIe graphics card, 1 GB 601155-001
* ATI Radeon HD5450 PCIe graphics card, 512 MB 617079-001
* GeForce G315, PCIe graphics card, 1 GB 619934-001
* GeForce G320, PCIe graphics card, 1 GB 615793-001
* GeForce G210, PCIe graphics card, 512 MB 586382-001
* Intel Gigabit NIC, includes bracket 490367-001
* HP FireWire IEEE 1394 PCI card, FH 515182-001
* 1394 PCI card, 3 port, FH 441448-001
* Antenna, dual band, 802.11 583345-001
AMD Athlon II X2 processors with alcohol pad and thermal grease:
* X4 645, dual core, 2-MB cache, 3.1 GHz 628883-001
* X4 640, dual core, 2-MB cache, 3.0 GHz 614516-001
* X4 635, dual core, 2-MB cache, 2.9 GHz 617834-001
* X4 630, dual core, 2-MB cache, 2.8 GHz 586735-001
* X3 450, dual core, 1.5-MB cache, 3.2 GHz 628882-001
* X3 445, dual core, 1.5-MB cache, 3.1 GHz 614515-001
* X3 440, dual core, 1.5-MB cache, 3.0 GHz 617833-001
* X3 435, dual core, 1.5-MB cache, 2.9 GHz 586733-001
* X3 425, dual core, 1.5-MB cache, 2.7 GHz 586732-001
* X2 265, dual core, 1-MB cache, 3.3 GHz 628881-001
* X2 260, dual core, 1-MB cache, 3.2 GHz 614513-001
* X2 255, dual core, 1-MB cache, 3.1 GHz 617832-001
* X2 250, dual core, 1-MB cache, 3.0 GHz 584221-001
* X2 245, dual core, 1-MB cache, 2.9 GHz 586731-001
* X2 240, dual core, 1-MB cache, 2.8 GHz, C2 584222-001
* X2 220, dual core, 1-MB cache, 2.8 GHz, C3 611192-001
* X2 215, dual core, 1-MB cache, 2.7 GHz 586730-001
AMD Phenom II processors with alcohol pad and thermal grease:
* X4 955, quad core, 2-MB cache, 3.2 GHz 614519-001
* X4 945, quad core, 2-MB cache, 3.0 GHz 586741-001
* X4 910, quad core, 2-MB cache, 2.6 GHz 586740-001
* X4 820, quad core, 2-MB cache, 2.8 GHz 586739-001
* X4 810, quad core, 2-MB cache, 2.6 GHz 586738-001
* X3 740, triple core, 1.5-MB cache, 3.0 GHz 586737-001
* X2 550, dual core, 1-MB cache, 3.1 GHz 614518-001
AMD Sempron processor with alcohol pad and thermal grease:
* 145, single core, 1-MB cache, 2.8 GHz 611196-001
* 140, single core, 1-MB cache, 2.7 GHz 586742-001
* Not shown
System Board Connectors and Jumpers (position of some untitled
components may vary in location)
PROCESSOR Processor socket CHASSIS_
FAN1
Chassis fan connector
XMM1-2 Memory slots PCI1 PCI slot
CPU FAN Fan connector SPDIF_OUT2 S/PDIF connector
ATX_POWER 24-pin main power connector F_AUDIO Front panel audio connector
SATA0-3 Drive connectors PCIE_X1_2 PCIe x1 slot
CMOS+PW CMOS password header PCIE_X1_1 PCIe x1 slot
F_PANEL Front I/O connector PCIE 16X PCIe x16 slot
F_USB4 Internal USB connector AUDIO External in/out connectors
F_USB3 Internal USB connector LAN+USB Stacked network/USB
connectors
F_USB2 Front I/O connector AT X_ CPU 4-pin CPU power connector
F_USB1 Front I/O connector USB Stacked USB connectors
BATTERY RTC battery socket VGA Monitor connector
Diagnostic Beep Codes
Beeps Diagnosis Recommended Action
1 short, 1 long,
3 sec pause
Bad memory or memory configura-
tion error
Check that the memory modules
have been installed correctly and
that proper modules are used.
2 short, 1 long,
3 sec pause
No graphics card installed or graph-
ics card initialization failed.
For systems with a graphics card:
1. Reseat the graphics card. Power
on the system.
2. Replace the graphics card.
3. Replace the system board.
For systems with integrated graph-
ics, replace the system board.
3 short, 1 long,
3 sec pause
CPU configuration error or invalid
CPU detected before graphics card
initialized.
For systems with a graphics card:
1. Reseat the graphics card. Power
on the system.
2. Replace the graphics card.
3. Replace the system board.
For systems with integrated graph-
ics, replace the system board.
1 short, 1 sec
pause
No legacy floppy drive or optical
drive found
1. Check cable connections.
2. Run the Setup utility and ensure
the device port is enabled.
2 short, 3 sec
pause
No floppy diskette or CD found 1. Check the type of drive you are
using and use the correct media
type.
2. Replace the diskette or CD with a
new one.
3 short, 3 sec
pause
Flashing not ready (missing utility
or BIOS image file, etc.)
Upgrade the BIOS to proper ver-
sion.
4 short, 3 sec
pause
Flashing operation has failed
(checksum error, corrupted image,
etc.)
1. Verify the correct ROM.
2. Flash the ROM if needed.
3. If an expansion board was
recently added, remove it to see if
the problem remains.
4. Clear CMOS.
5. If the message disappears, there
may be a problem with the
expansion card.
6. Replace the system board.
5 short, 3 sec
pause
BIOS recovery was successful No action required.