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A new motherboard was installed in my computer, it will turn on, BUT it makes a long beeping sound and stops and starts up again. what do i do to resolve this problem?

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Here are some common steps a POST performs each time your computer starts.

  1. Test the power supply to ensure that it is turned on and that it releases its reset signal.
  2. CPU must exit the reset status mode and thereafter be able to execute instructions.
  3. BIOS checksum must be valid, meaning that it must be readable.
  4. CMOS checksum must be valid, meaning that it must be readable.
  5. CPU must be able to read all forms of memory such as the memory controller, memory bus, and memory module.
  6. 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.
  7. I/O bus / controller must be accessible.
  8. I/O bus must be able to write / read from the video subsystem and be able to read all video RAM.
  9. If the Video or other parts of these steps encounters a problem then the system will emit a series of beeps that could let you know what the problem is.
I would disconnect all your devices from your motherboard except for the memory and the video and see if you can power up with the post messages on the screen. Make sure that your memory and your video card are seated securely. If you have 2 memory chips and 1 could be bad, you could remove 1 of them and try your power up again. The reason that we remove the other hardware from your system, is because they could be causing a conflict on the Motherboard.
Joe < Data Miner >

Posted on Nov 01, 2008

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My cpu is making 1long beep and 3 short beep sounds and not restarting.


This POST beep code usually means a RAM problem.
Try reseating your RAM module/s and reboot your computer.
Try the BIOS setting and check the RAM size, does it match the total installed RAM.
If you suspect the RAM is faulty, remove the RAM module/s and take it to your friendly computer repair shop and get them to test the RAM for you.

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Regards.

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1 Answer

Same problem


I would try to replace the PSU and see if that makes your computer boot. Do like a guess and check. If its not the PSU, maybe try a new motherboard. Does the computer not boot, or does it beep when turned on? I hope this helps solve your problem

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