One of my computers is following a strange behaviour since some weeks. Sometimes 1 hour after power on, sometimes after 5 days, it suddenly starts beeping. To be exact, it is a continuous beep (it really sounds like an indefinite pattern of "beeps" without any separation among them).

My CPU is P4 3.0 hyper; the motherboard is Aopen AX4PE Max, and I think there is a led next to the CPU that begin to flash when the beep starts - I am not sure and I really don't want the beeps to start ;). I have checked out the manual and forums and I have find nothing about this in AOpen.

More generally, I've been told it can be a memory or graphics card problem. I don't think it is a memory problem, as I can work with the computer - and I really use every piece of memory it has. I'm monitoring CPU and case temperature, but beeps appear even when 40 Celsius, so I would discard that problem.

The graphics card is an nVidia Riva TNT2 M64, which I believe is AGP2. I really don't know if the motherboard supports that, but it works...

I would really appreciate if you can point me in the right direction. When beeps appear the only way to shut them up is shutting down the computer. If I restart the computer just after shutting it down, there are no more beeps. It is annoying - and noisy!

BTW: I have disabled heat alerts in BIOS (maybe Windows put it on?) and set fans to 100% in BIOS too.
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Sohel RanaConnect With a Mentor Commented:

I faced the same problem few months before and I find that my video card was out of order. Please try to replace another video card and check whether it fix the problem or not?

Did you install the hardware monitoring utility?  It's supposed give an alarm when something is out of spec:  It is also possible there is a fault in a sensor.
magus123Connect With a Mentor Commented:
like callandor said check out your temps with a tool and also go into the bios and check out the
temps there , stay in there and see if it climbs dramatically or the level alerts are low,
your going to have to know what level of degrees your cpu and motherboard are common.
also a hardware monitor can also tell if you have voltage and electricity spikes from
wires . the sensors could be warninng of you in any danger , it want to see if any of
these are the cases , you should use a benchmark or a resource driven application
that will overwhelm your computer with calls and cause the computer to use more
resources , during this time the computer will have to work harder causing the
problem to appear out of nowhere if  the problem is driven by the problems
mentioned above.

it could also be a good idea to check your event viewer for problem, i also forgot
to mention their are cpu hog programs out their to test the cpu and to see
if your temps go way up.
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look on the motherboard manual and check what that beep means then you will have an idea where the problem is (each beep has a code where the hardware fault is located consult the motherboard's manual)
Is there a fan speed monitor in the bios? Could be the fan is falling below a certain speed and setting off the alarm.
stockhesConnect With a Mentor Commented:
I agree with rsdn

replace GFX ASAP it draws too much power on the AGP port. New card should be AGP2.0 or 3.0 compliant.
Sohel RanaCommented:
Thanks. ^*--*^
fernandonajeraAuthor Commented:
Oops... I thought I pushed the submit button.

I suspected from the video card too. Temperatures don't rise when the beep starts, and the AOpen program won't start under my W2K3. Event viewer don't show anything also. I'll replace video card tomorrow. Thank you all for your comments.
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