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Change RAM Hello, due to a reboot which would happen sporadically on my computer, I tried to solve the problem by changing my RAM's from 2X 512 MB (original) to 1X 1GB. The RAM I installed is a 400 MHZ. When rebooting my computer with the new RAM installed, the computer started making a long beep, showing on the screen unclear colours on a black background. After re-booting the computer a couple of times (with still no success), I decided to fit ONE old RAM with the new one -same result. I finally decided to get back to the original spec with the 2 original RAM installed. Unfortunately the computer still would not turn on, except this time it does now show anything on the screen, the beep start continuous and then changes into a siren noise, and an LED blinks next to the RAM bars (near the CPU LED which itself stays on). Unfortunately I have not assembled this computer myself and therefore I am not very confortable with the wiring inside the computer. Can you assist me? Thanks a lot in advance for your support, Laurent

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  • Lolo63 Jan 16, 2008


    Unfortunately when putting the original RAM back in the system still does not boot and does a siren nose following a long beep...

  • Lolo63 Jan 17, 2008


    thanks for the suggestion s2dak_jr. I followed your instructions yesterday unfortunately it does not change much: 1rst time I rebooted it, the Aopen screen came up, the computer did a single beep and then it froze... I rebooted the computer and it did the same as before: nothing on the screen, computer does a long beep before it starts doing a siren sound, and a red LED near the RAM blinks.

    Any further suggestion? Does anybody know what the blinking LED could be for? Is there a BIOS reset button ?

    Suggestions are welcome,


  • Lolo63 Jan 18, 2008


    Thanks to those who tried to assist in resolving my issue. I went round the loop again yesterday evening and rechecked the RAM. The system booted normally after taking the RAM out and putting it in again - it was obviously not inserted properly.

    Best regards




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Try this........................

  • unplug the power cord from the mother board
  • remove all RAMs from their slots
  • reomove CMOS battery
After 15/20 minutes...........................
  • plug the power cord back
  • put the battery back
  • insert the original RAMs
  • then start your system and check the results
let me informed............

Posted on Jan 16, 2008

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  • Anonymous Jan 17, 2008

    check this..........................

    Table IBM BIOS Beep Codes

    Audio Code

    Sound Graph


    1 short beep

    Normal POST—system okay

    2 short beeps


    POST error—error code on display

    No beep

    Power supply, system board

    Continuous beep


    Power supply, system board

    Repeating short beeps


    Power supply, system board


    1 long, 1 short beep


    System board

    1 long, 2 short beeps


    Video adapter (MDA/CGA)

    1 long, 3 short beeps


    Video adapter (EGA/VGA)

    3 long beeps

    - - -

    3270 keyboard card

  • Anonymous Jan 17, 2008

    check this too...................................................................

    BIOS/Phoenix FirstBIOS POST Beep Codes


    Error Description


    1 long, 2 short

    Video Card Error

    Check the video card for proper installation. Try replacing the video card memory, and replace the video card. Replace the motherboard.

    1 long, 3 short

    Video Card Error

    Check the video card for proper installation. Try replacing the video card memory, and replace the video card. Replace the motherboard.

    Continuous beeps

    Memory Error

    Clean the memory contacts, and reseat the modules. Remove all modules except the first bank. Replace the memory, power supply, and motherboard.

  • simen27 Mar 05, 2011

    Thank you this helped me alot, i was able to find that the pc had a memory error thanks to your list.
    Once again thank you very much



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If you put the original RAM back in (both sticks) does the system boot?

Posted on Jan 15, 2008

  • Dean Joly
    Dean Joly Jan 16, 2008

    In my opinion the system is not seeing any ram at all, or it may not be seeing its video card on or the other. Make sure everything is seated properly.



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