Compaq 500B, MT
594184-001
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
586722-001
Memory modules
2
2 GB, PC3-10600
576110-001
2
1 GB, PC3-10600
576109-001
Other boards
*
HP Wireless 802.11b/g/n WLAN card
538048-001
*
802.11b/g/n WLAN card, for use in ROW
498307-001
*
LSI 56K modem, PCIe
490689-001
*
ATI Radeon HD4350 (RV710) PCIe x16 graphics card, 512 MB
586750-001
*
GeForce G210, PCIe graphics card, 512MB
586382-001
*
Intel Gigabit NIC, includes bracket
490367-001
*
HP FireWire IEEE 1394 PCI card, FH
515182-001
*
Serial port, PCI adapter
321722-001
Intel Celeron Processors with alcohol pad and thermal grease:
E3300, 1-MB cache, 2.50 GHz
585886-001
E3200, 1-MB cache, 2.40 GHz
585885-001
E1600, 512-MB cache, 2.40 GHz
577416-001
E1500, 512-MB cache, 2.20 GHz
516899-001
450, 512-KB cache, 2.20 GHz
508256-001
440, 512-KB cache, 2.00 GHz
449166-001
Intel Core2 Quad Processors with alcohol pad and thermal grease:
Q8300, 4-MB cache, 2.50 GHz (primary)
Q8300, 4-MB cache, 2.50 GHz (alternate)
516901-001
583005-001
Intel Core2 Duo Processors with alcohol pad and thermal grease:
E8600, 6-MB cache, 3.33 GHz
497732-001
E8500, 6-MB cache, 3.16 GHz
466170-001
E8400, 6-MB cache, 3.00 GHz
509554-001
E7600, 3-MB cache, 3.06 GHz
573954-001
E7500, 3-MB cache, 2.93 GHz (primary)
E7500, 3-MB cache, 2.93 GHz (alternate)
531988-001
583006-001
E6500, 2-MB cache, 2.93 GHz
586748-001
E6300, 2-MB cache, 2.80 GHz
580748-001
E5400, 2-MB cache, 2.70 GHz
586743-001
E5300, 2-MB cache, 2.60 GHz
586747-001
* Not shown
System Board Connectors and Jumpers (position of some untitled
components may vary in location)
PROCESSOR
Processor socket
PCI2
PCI slot
CPU FAN
Fan connector
PCIE1X1
PCIe x1 slot
DIMM1-2
Memory slots
PCIE1X
PCIe x1 slot
ATX_POWER
24-pin main power connector
PCIE16X
PCIe x16 slot
BATTERY
RTC battery socket
AUDIO
External in/out connectors
SATA0-3
Drive connectors
NIC_USB
Stacked network/USB connec-
tors
F_PANEL
Front I/O connector
USB
Stacked USB connectors
P154
Front I/O connector
ATX_12V
4-pin CPU power connector
P152
Front I/O connector
VGA
Monitor connector
F_AUDIO
Front audio 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.
