Question about Motherboards

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I have a kt400 Dragon motherboard I am hooking up. When I turn the power on the cpu fan comes on the the buzzer on the motherboard sounds and the fan stops and nothing works.

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  • alanivanjr Dec 11, 2008

    Yes the cpu is properly seated. It takes only 2-3 sec . after you hit the power button and the buzzer on the motherboard goes off. The green led is lit on the motherboard. Do you know what the buzzer is for on the motherboard?

  • alanivanjr Dec 12, 2008

    does Anyone know what the buzzer is for on this motherboard. Or does anybody have a manual for this motherboard. Thank you for your help.


  • alanivanjr Dec 19, 2008

    Is there any way to check cpu to see if it is damaged.

  • Mark Robinson May 11, 2010

    have you made sure the CPU is seated properly ?

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This is a Soyo motherboard which was discontinued some time ago. Soyo does provide some support, though, with drivers and the manual located here:

http://www.soyo.com/content/Downloads/155/&c=37&p=146&l=English

The buzzer you are hearing is the ABR Buzzer. ABR stands for Anti-Burn Regulator. Circuitry on the MB monitors the internal CPU temperature, and when it rises above a certain level, the buzzer sounds and the system will shut down, to prevent the CPU from being fried.

In my experience, this is typically due to a malfunctioning CPU fan. You said yours is spinning at boot, so it might not be the fan. It may also be that you are trying to use a CPU that is not fully compatible with the motherboard (especially one that is 6 years old). If this is the case, the ABR software may be mis-reading the data from the CPU, thinking it is overheating, and then shutting it down.

The manual is one of the best I've seen as for detail and explanations, so I'd give it a look. This is the direct link for it:

http://www.soyo.com/uploads/downloads/manuals/k7/mk7vx4b12.pdf

Also, if you are trying to overclock the CPU, that can cause overheating in a hurry, and result in a shutdown. You might want to reset the motherboard to factory defaults (remove the CMOS battery, wait a bit, re-install it), in case a previous owner had been using overclocking.

Cheers
Nick

Posted on Dec 14, 2008

  • Nick Nicholson
    Nick Nicholson Dec 19, 2008

    To troubleshoot something, you basically need to replace everything but that item, or replace that item and see if everything else works. Plug a new CPU into the board (or a different one that fits), and see if it boots. Alternately, find another system you know is working, and has a CPU compatible with the one you have, and swap them. If the CPU is dead, the system won't work. If it boots, you know it is okay.

    Really, considering the age and value of both the motherboard and CPU, I wouldn't spend too much time on them. You can buy a brand new CPU and MB which are twice as fast what you have, for less than fifty bucks.

    Cheers
    Nick


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When I turned up the cpu fan dont run and shut off


Sound like sever hardware failure. Try replacing fan.

Aug 24, 2012 | Soyo KT400 Dragon Ultra Motherboard

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How to update the bios without a floppy


Check with the manufacturer.

Visit there website.http://drivers.softpedia.com/downloadTag/SoyoSY-KT400+DRAGON+Ultra


The last one was in 2007. You need to use a exe bios file. I doubt there have been any new bios drivers for this model.

If you dont need to update then i do not recommend doing it.

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What are the functions of its parts?


1) Motherboard Diagram, (Proper computer speak for motherboard is Mainboard. I just use Mobo.
MOtherBOard)

http://en.wikipedia.org/wiki/File:Motherboard_diagram.svg

2) Soyo SY-KT400 Dragon Ultra - motherboard diagram,

http://techreport.com/articles.x/4139


CPU = Central Processing Unit. Another term is Microprocessor, or simply Processor for short.
The 'Brain' of the computer.

The Processor sits in a processor socket.
The processor socket for the Soyo SY-KT400 is a Socket A. Also known as Socket 462.

http://en.wikipedia.org/wiki/Socket_462


The motherboard chipset is the Northbridge chip, and Southbridge chip.

The motherboard chipset for the Soyo SY-KT400 is the VIA KT400 - Northbridge chip, and the VIA VT8235 - Southbridge chip.

http://en.wikipedia.org/wiki/List_of_VIA_chipsets#Slot_A_and_Socket_A


The Northbridge chip handles the Faster capabilities of the computer.

The Northbridge chip determines what Processors can be supported, what Ram Memory can be supported, and High-Speed graphics.

High-Speed graphics being AGP and PCI Express, not a graphics card installed in a PCI slot, nor Integrated Graphics.

The Processor communicates with the Northbridge chip through the Front Side Bus. (FSB)
Think of the FSB as an 'Information Highway'.

The Northbridge chip communicates TO the Southbridge chip through the Internal Bus.

The Southbridge chip handles the Slower capabilities of the computer.

The Southbridge chip handles IDE, SATA, USB, Ethernet, Integrated Graphics, and the PCI bus.
(As in a graphics card installed in a PCI expansion slot, for one example)

Also handles information from the Super I/O chipset.
The Soyo SY-KT400 - Super I/O chipset is a VIA VT1211

There are 5 PCI slots. All connected to the PCI bus, which is connected to the Super I/O chipset.


Click on this link,

http://techreport.com/articles.x/4139/2

Scroll down a little bit to the photo of the Soyo SY-KT400 motherboard.

A) At the top middle is the Processor socket. White in color, rectangular in shape, square hole in the middle, and socket holes on it.

To the immediate left of the Processor socket are 8 Electrolytic Capacitors in a row.
These capacitors are Radial Aluminum Electrolytic Capacitors. (Used all over the motherboard)

These particular 8 are part of the motherboard voltage regulator circuit.
Specifically, voltage regulation for the Processor.

B) To the right of the Processor socket are three long Black Ram Memory slots. (Proper computer speak for Slot, is Bank. 3 Ram Memory Banks)

C) The Blue and the White connectors to the right of the Ram Memory slots are IDE connectors.
One for the Harddrive, the other one for the optical drive/s.

D) Underneath the Processor is the Northbridge chip. There is a clear fan sitting on it.

E) The large square Black chip with VIA on it, below the Ram Memory slots, and to the right of the purple PCI slots, is the Southbridge chip.

F) The 5 purple long slots are PCI expansion slots.

G) To the right of the bottom purple PCI slot is the CMOS battery.

H) Above the purple PCI slots is a brown AGP slot.
Uses AGP 8X graphics cards

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I was running a virus check, asked what to do, I said fix, computer shut down and alarm buzzer came on. now I don't get a boot sound


soks3d,
With the system shut down, unplug the power cable from the power supply. Open you're case and pull the memory from the system wait a minute than reseat the memory. Re-connect the power cable to the power supply. Try booting the system and enter the bios menu. (Pulling the memory will clear any memory resident virus). This has nothing to do with the alarm buzzer sound you heard. Typically the alarm sound is generated by the CPU. It's an audible warning that the CPU is over-heating. The CPU will shut down you're system so as not to damage the motherboard and CPU. (Suggest you check the CPU fan for dust build-up. Use canned air to help remove any build-up. You can also use a clean paint brush to help remove any dust from under each CPU fan blade.
It's also possible that the CPU fan is running far too slow and may need to be replaced.
See page 3-23 in you're user manual.
3-8. PC Health Status.

Open the link provided below for a new heat-sink and fan assembly for a socket 462;
http://www.directron.com/a4004d.html
If the CPU fan and heat-sink assembly seems clean it is also possible that the thermal grease / thermal tape between the heat-sink and CPU is too old and needs to be replaced. (Save this check for last).
Below is the link for you're motherboard;
http://www.abit.com.tw/page/en/motherboard/motherboard_detail.php?pMODEL_NAME=KV7-V&fMTYPE=Socket+A

Cheers'
Mike

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Though the descriptions vary, I suggest you check your CPU heat-sink & fan assembly. Clean assembly from excessive dust build up. Remove CPU fan if possible & clean the heat-sink. Check the CPU fan, it may be turning too slowly & may need to be replaced. The average CPU fan runs between 2000 Rpm & 3000Rpm. Blow out your power supply with canned air. Disconnect & than re-connect the Main power connector (2x12) on the board. Item No# K, found on page 11 in your manual. Try these first. See if the buzz sound stops after a good cleaning.
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Good luck kuldeep11203!
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