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Thread: POST Beep Error

  1. #1
    Join Date
    Mar 2009
    Posts
    55

    POST Beep Error

    I have a problem with the desktop which started this morning when i started the computer i got no image on the screen but the CPU is working. I reconnected the computer but still the same problem persist.

    I have a gigabyte GA - 81TXR Mainboard, Intel P4 2.4 GHz CPU & 2 X 128MB PC800 RAMBUS...

    The computer makes three beeps. after a little pause this beeps are repeated again & again till i dnt close the computer directly.

    Can anyone Help Please...!

  2. #2
    Join Date
    Nov 2005
    Posts
    1,187

    Re: POST Beep Error

    POST ABCs

    The computer POST (Power On Self Test) tests the computer, insuring that it meets the necessary system requirements and that all hardware is working properly before starting the remainder of the boot process. If the computer passes the POST the computer will have a single beep (with some computer BIOS manufacturers it may beep twice) as the computer starts and the computer will continue to start normally. However, if the computer fails the POST, the computer will either not beep at all or will generate a beep code, which tells the user the source of the problem.

    The steps of a POST

    Each time the computer boots up the computer must past the POST. Below is the common steps a POST performs each time your computer starts.
    Test the power supply to ensure that it is turned on and that it releases its reset signal.
    CPU must exit the reset status mode and thereafter be able to execute instructions.
    BIOS checksum must be valid, meaning that it must be readable.
    CMOS checksum must be valid, meaning that it must be readable.
    CPU must be able to read all forms of memory such as the memory controller, memory bus, and memory module.
    The first 64KB of memory must be operational and have the capability to be read and written to and from, and capable of containing the POST code.
    I/O bus / controller must be accessible.
    I/O bus must be able to write / read from the video subsystem and be able to read all video RAM.

    If the computer does not pass any of the above tests, your computer will receive an irregular POST. An irregular POST is a beep code that is different from the standard one or two beeps. This could be either no beeps at all or a combination of different beeps indicating what is causing the computer not to past the POST.

    If you're receiving an irregular POST document CH000607 contains all the steps a user can do to resolve the issue or help determine what hardware has failed in the computer so it can be replaced. If you're getting a beep code the remainder of this page contains a listing of each of the major manufacturers beep codes and what they each mean. Index

    Category:
    BIOS

    Companies:
    Click here

    Related Pages:
    AMI BIOS
    Phoenix BIOS


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    AMI BIOS beep codes

    Below are the AMI BIOS Beep codes that can occur. However, because of the wide variety of different computer manufacturers with this BIOS, the beep codes may vary.

    1 short - DRAM refresh failure CH000996

    2 short - Parity circuit failure CH000607

    3 short - Base 64K RAM failure CH000996

    4 short - System timer failure CH000607

    5 short - Process failure CH000607

    6 short - Keyboard controller Gate A20 error CH000383

    7 short - Virtual mode exception error CH000607

    8 short - Display memory Read/Write test failure CH000607

    9 short - ROM BIOS checksum failure CH000607

    10 short - CMOS shutdown Read/Write error CH000239

    11 short - Cache Memory error CH000607

    1 long, 3 short - Conventional/Extended memory failure CH000996

    1 long, 8 short - Display/Retrace test failed CH000607


    AWARD BIOS beep codes

    Below are Award BIOS Beep codes that can occur. However, because of the wide variety of different computer manufacturers with this BIOS, the beep codes may vary.

    1 long, 2 short - Indicates a video error has occurred and the BIOS cannot initialize the video screen to display any additional information CH000607

    Any other beep(s)- RAM problem. CH000996

    If any other correctable hardware issues, the BIOS will display a message.


    IBM BIOS beep codes

    Below are IBM BIOS Beep codes that can occur. However, because of the wide variety of models shipping with this BIOS, the beep codes may vary.

    Macintosh startup tones

    Error Tone. (two sets of different tones) - - Problem with logic board or SCSI bus.
    Startup tone, drive spins, no video - - Problem with video controller.

    Powers on, no tone. - - Logic board problem.

    High Tone, four higher tones. - - Problem with SIMM.


    Phoenix BIOS beep codes

    Below are the beep codes for PHOENIX BIOS Q3.07 OR 4.X
    Beep Code - - Description / What to Check
    1-1-1-3 - - Verify Real Mode.
    1-1-2-1 - - Get CPU type.
    1-1-2-3 - - Initialize system hardware.
    1-1-3-1 - - Initialize chipset registers with initial POST values.
    1-1-3-2 - - Set in POST flag.
    1-1-3-3 - - Initialize CPU registers.
    1-1-4-1 - - Initialize cache to initial POST values.
    1-1-4-3 - - Initialize I/O.
    1-2-1-1 - - Initialize Power Management.
    1-2-1-2 - - Load alternate registers with initial POST values.
    1-2-1-3 - - Jump to UserPatch0.
    1-2-2-1 - - Initialize keyboard controller.
    1-2-2-3 - - BIOS ROM checksum.
    1-2-3-1 - - 8254 timer initialization.
    1-2-3-3 - - 8237 DMA controller initialization.
    1-2-4-1 - - Reset Programmable Interrupt Controller.
    1-3-1-1 - - Test DRAM refresh.
    1-3-1-3 - - Test 8742 Keyboard Controller.
    1-3-2-1 - - Set ES segment to register to 4 GB.
    1-3-3-1 - - 28 Autosize DRAM.
    1-3-3-3 - - Clear 512K base RAM.
    1-3-4-1 - - Test 512 base address lines.
    1-3-4-3 - - Test 512K base memory.
    1-4-1-3 - - Test CPU bus-clock frequency.
    1-4-2-4 - - Reinitialize the chipset.
    1-4-3-1 - - Shadow system BIOS ROM.
    1-4-3-2 - - Reinitialize the cache.
    1-4-3-3 - - Autosize cache.
    1-4-4-1 - - Configure advanced chipset registers.
    1-4-4-2 - - Load alternate registers with CMOS values.
    2-1-1-1 - - Set Initial CPU speed.
    2-1-1-3 - - Initialize interrupt vectors.
    2-1-2-1 - - Initialize BIOS interrupts.
    2-1-2-3 - - Check ROM copyright notice.
    2-1-2-4 - - Initialize manager for PCI Options ROMs.
    2-1-3-1 - - Check video configuration against CMOS.
    2-1-3-2 - - Initialize PCI bus and devices.
    2-1-3-3 - - Initialize all video adapters in system.
    2-1-4-1 - - Shadow video BIOS ROM.
    2-1-4-3 - - Display copyright notice.
    2-2-1-1 - - Display CPU type and speed.
    2-2-1-3 - - Test keyboard.
    2-2-2-1 - - Set key click if enabled.
    2-2-2-3 - - 56 Enable keyboard.
    2-2-3-1 - - Test for unexpected interrupts.
    2-2-3-3 - - Display prompt Press F2 to enter SETUP.
    2-2-4-1 - - Test RAM between 512 and 640k.
    2-3-1-1 - - Test expanded memory.
    2-3-1-3 - - Test extended memory address lines.
    2-3-2-1 - - Jump to UserPatch1.
    2-3-2-3 - - Configure advanced cache registers.
    2-3-3-1 - - Enable external and CPU caches.
    2-3-3-3 - - Display external cache size.
    2-3-4-1 - - Display shadow message.
    2-3-4-3 - - Display non-disposable segments.
    2-4-1-1 - - Display error messages.
    2-4-1-3 - - Check for configuration errors.
    2-4-2-1 - - Test real-time clock.
    2-4-2-3 - - Check for keyboard errors
    2-4-4-1 - - Set up hardware interrupts vectors.
    2-4-4-3 - - Test coprocessor if present.
    3-1-1-1 - - Disable onboard I/O ports.
    3-1-1-3 - - Detect and install external RS232 ports.
    3-1-2-1 - - Detect and install external parallel ports.
    3-1-2-3 - - Re-initialize onboard I/O ports.
    3-1-3-1 - - Initialize BIOS Data Area.
    3-1-3-3 - - Initialize Extended BIOS Data Area.
    3-1-4-1 - - Initialize floppy controller.
    3-2-1-1 - - Initialize hard-disk controller.
    3-2-1-2 - - Initialize local-bus hard-disk controller.
    3-2-1-3 - - Jump to UserPatch2.
    3-2-2-1 - - Disable A20 address line.
    3-2-2-3 - - Clear huge ES segment register.
    3-2-3-1 - - Search for option ROMs.
    3-2-3-3 - - Shadow option ROMs.
    3-2-4-1 - - Set up Power Management.
    3-2-4-3 - - Enable hardware interrupts.
    3-3-1-1 - - Set time of day.
    3-3-1-3 - - Check key lock.
    3-3-3-1 - - Erase F2 prompt.
    3-3-3-3 - - Scan for F2 key stroke.
    3-3-4-1 - - Enter SETUP.
    3-3-4-3 - - Clear in-POST flag.
    3-4-1-1 - - Check for errors
    3-4-1-3 - - POST done--prepare to boot operating system.
    3-4-2-1 - - One beep.
    3-4-2-3 - - Check password (optional).
    3-4-3-1 - - Clear global descriptor table.
    3-4-4-1 - - Clear parity checkers.
    3-4-4-3 - - Clear screen (optional).
    3-4-4-4 - - Check virus and backup reminders.
    4-1-1-1 - - Try to boot with INT 19.
    4-2-1-1 - - Interrupt handler error.
    4-2-1-3 - - Unknown interrupt error.
    4-2-2-1 - - Pending interrupt error.
    4-2-2-3 - - Initialize option ROM error.
    4-2-3-1 - - Shutdown error.
    4-2-3-3 - - Extended Block Move.
    4-2-4-1 - - Shutdown 10 error.
    4-3-1-3 - - Initialize the chipset.
    4-3-1-4 - - Initialize refresh counter.
    4-3-2-1 - - Check for Forced Flash.
    4-3-2-2 - - Check HW status of ROM.
    4-3-2-3 - - BIOS ROM is OK.
    4-3-2-4 - - Do a complete RAM test.
    4-3-3-1 - - Do OEM initialization.
    4-3-3-2 - - Initialize interrupt controller.
    4-3-3-3 - - Read in bootstrap code.
    4-3-3-4 - - Initialize all vectors.
    4-3-4-1 - - Boot the Flash program.
    4-3-4-2 - - Initialize the boot device.
    4-3-4-3 - - Boot code was read OK.

  3. #3
    Join Date
    May 2008
    Posts
    1,205

    Re: POST Beep Error

    It could be either or both of two problems

    1 - PSU by your own estimation is not doing the job

    2 - A glitch on the latest PSU hosed the mobo.

    We should really be diagnosing this with the right PSU.

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