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I'm now trying to get this computer to work. For the most part
everything seems to work fine except that there is a continuous two
tone siren coming from the Abit AI7 motherboard that starts as soon as
I power on.
After some googling I found that "A two-tone siren, generally caused by overheating or out of specification voltages". I have a general understanding of what this means but not sure what to do.
Currently the symptoms I'm experiencing are (that I am aware of are)
1. two tone siren
2. CPU overheating up to 80C or higher if I dont shut down, and thats just sitting in bios page, not even booted into any OS.
At this point I should mention that visually all the fans (cpu, psu,
northbridge, large case fan, and video card fan) appear to be running
normally and that I've already tried resetting the BIOS to its factory
fail safe defaults. I've also removed the RAM and tried different
sticks in different slots.
I googled pretty heavily to find problems similar to mine but with no
success, I'm not very experinced in trouble shooting hardware and I've
never built a computer before so Im kind of stuck here.
My guess is that the CPU is over clocked through jumpers on the
motherboard but I'm not sure how to change those. Also the link to my
motherboard's manual on the Abit site is broken (lucky me)
Upon closer inspection I realized that the cpu heatsink was completely encased in dust, to the point where the fan on top of it was not getting any air to it at all. So after blowing out all that dust cpu temperature went back to normal and no longer overheating.
Also I now know that the voltage control on this motherboard is done through the bios and not through jumpers, the settings on the bios are all correct and the cpu voltage is currently at the lowest possible option.
So I've ruled out cpu overheating, I'm begining to think its the PSU it is about 4 years oldUpon closer inspection I realized that the cpu heatsink was completely encased in dust, to the point where the fan on top of it was not getting any air to it at all. So after blowing out all that dust cpu temperature went back to normal and no longer overheating.
Also I now know that the voltage control on this motherboard is done through the bios and not through jumpers, the settings on the bios are all correct and the cpu voltage is currently at the lowest possible option.
So I've ruled out cpu overheating, I'm begining to think its the PSU it is about 4 years old
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At first go to the bios. then default the bios setting. then check the system monitor. if the cpu is too hot you can see it. or you can change the processor. never over clock the processor.
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This may be a bad power supply or an overheating problem. be sure the cpu cooling fan is spinning and you don't get, possibly, a siren tone from the computer (usual warning of over heating) Make sure the heat sink cooling fins aren't clogged with dust and that the heat sink is attached to the CPU correctly. sometimes a clip breaks and the sink loses contact with the chip. if this happens, the chip will overheat almost immediately.
good luck
Try removing all plates and covers and restart
Also check where you soldered for any excess solder touching anywhere on m/board or case
It is a heat problem you could try a packet of frozen food suitably covered to see if it works longer
There should be some sort of beeps then. No beeps is an indication the CPU or RAM is not seated properly. You need to refer to board manual if there are beeps. There is also the matter of... Never mind I just noticed the CPU is an 8 core CPU, but the board supports quad core. Board specs http://www.gigabyte.com/products/product-page.aspx?pid=3833#sp
Although the cpu fan may be working, the alarms are set to a temperature setting, so if the heat-sink that the fan is mounted gets clogged with dust ,dirt hair etc.. the processor temp rises and the alarm goes off. And in some cases if the user doesn't shut it down within a certain time period it is shut down automatically. When you boot it up, the temp might be rising to that setting faster than the operting system can load. Try a vac to clean it / or compressed air to blow it out
The voltage is normal, it's a 3 volt battery.
The low tone is usually generated by a faulty memory. How to test that (i'm assuming that the monitor is working and correctly attached): first remove the memory modules, clean their connectors and try to start again; next remove all attached hard disks and optical units and try to start it again. If it's the same (you can't enter BIOS) then use another power source and try again. Finally try it by using another memory. If even then the problem is still there then the problem is in the motherboard - replace it.
The sound you are hearing is a warning that the CPU is over heating.
Try cleaning the CPU fan & the heatsink the fan is connected too.
If you built the system did you add thermal grease between the heatsink & CPU?
It is also possible the thermal grease has dried up & is no longer allowing the heat from the CPU to transfer to the heatsink. It may be time to replace the heatsink assembly.
If your over clocking the CPU reset it to normal.
Does it shut off with absolutely no warning sounds whatsoever?
Do you ever hear a faint PC beeper alarm that kinda sounds like a ambulance siren (you know... kinda like a WEEEE. ORRRRR... WEEEE... ORRRR)
My main suspect at this stage is OVERTEMP (you are overheating the CPU).
Possible Causes: Recently UPGRADED components (especially VIDEO)
Build up of dust in Case and CPU heatsink and GPU heatsink or CPU fan has failed or one or some case fans have failed.
Do you know how to check your CPU temp in BIOS? If it happens again check it out.... greater than 90 degrees is usually bad.
Check all your fans are spinning, check you don't have 'caked up' dust on your heatsinks.
If you have recently upgraded a major component that is dumping heat into you case... investigate a new case fan to extract this heat (cheapest option) or you may want to pick up an aftermarket CPU heatsink and fan (Thermalright FTW!!!!!!!)
Dual-tone siren meaning - hardware monitoring signalyzed that some problems with mobo, to ex.: - any Voltage (CPU, RAM, chipset etc) is bad - any Temperature (from any sensor) is bad - frequency of cooler is bad (or not connected)
Upon closer inspection I realized that the cpu heatsink was completely encased in dust, to the point where the fan on top of it was not getting any air to it at all. So after blowing out all that dust cpu temperature went back to normal and no longer overheating.
Also I now know that the voltage control on this motherboard is done through the bios and not through jumpers, the settings on the bios are all correct and the cpu voltage is currently at the lowest possible option.
So I've ruled out cpu overheating, I'm begining to think its the PSU it is about 4 years old
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