Question about AOpen AX34-U Motherboard

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Aopen ax34 tamper alarm--how to reset????

I was given 2 aopen ax34 computers and have been using one for 3 years. It's for a simple application at work (internet only) and has worked fine. I recently was unable to start the computer and got an error message that upon investigation suggested that the RAM was corrupted. A friend and I opened up the CPU, replaced the RAM from the unused computer and started it back up only to get a loud beeping noise. Neither of us had any idea what it was. At that point, we put in the original RAM and the computer still made the loud noise (neither computer came on at all). we tried starting the unused CPU and it made the same noise. At that point it dawned on us that it was probably some type of tamper alarm. Any idea how to reset it?


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I don't think that board actually has a tamper alarm in the bios, password security yes but I saw no mention of a tamper alarm. Besides, a tamper alarm won't stop the pc from booting, it just lets you know that the case has been opened....sorry. I think you likely have a mainboard/ram issue.

First thing is to clear the bios. Here's how. Right beside the floppy connector, there is a jumper labeled 'JP14'. Please do the following

  1. Turn off the pc and remove the ac power cord.
  2. Remove the atx power connector from the mainboard (from power supply).
  3. Locate jp14 and move the jumper from pins 1 and 2 to pins 2 and 3. Wait 10 seconds.
  4. Put jp14 back to pins 1 and 2
  5. Reconnect the atx power connector.
Or you can just unplug it from the waal and remove the bios battery for an hour.
sa code
Try to fire it up again. If it still won't boot, then let me know the number of beeps it makes and the pattern to the beeps ie: one long beep then another long beep or 1 long beep then 2 short ones. These beep are actually telling you what the problem is.

Hope this helps! Post a comment and let me know how you make out.

Posted on Sep 05, 2009

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Hi how are you tonight.I have an A Open AX 34 with no onboard video just AGP.The BIOS crashed and I tried resetting the CMOS battery it didn"t wotrk they are saying change the jumper pin are they...

No maxboxman they are not referring to the jumper pins on the harddrive.

Hi to you also maxboxman,

The reference is to jumper pins on the motherboard. There generally would be a jumper sitting on Pins 2 and 3 probably, and needs to be set to Pins 1 and 2.

(Pins 1 and 2 are the Run mode, Pins 2 and 3 are for BIOS reset. Just a General example, and does not apply towards your motherboard

[Inside the plastic jumper is a metal shell, or flat piece of metal. This metal creates contact between two pins. ]

However I'm looking at a PDF motherboard manual for the AOpen AX34-U motherboard, and no jumper pins are shown on the 'motherboard map', nor are any listed. (Anywhere in the manual, to include the BIOS section)
Just details how to enter BIOS Setup, and possible BIOS updates.

BIOS for AX34-U,

Click on the blue down arrow next to - select a product.
You have to wait for the page to load, watch the green progress bar.

After the page loads click on the blue down arrow to the left of Select a model.
Scroll down to AX34-U, and click on it.
Same thing, waiting game.

When this page loads scroll down to the heading BIOS.
To the right click on the download icon above 202.0 KB

Click on 2 at the bottom, (Page 2), and the English version of the motherboard manual is listed in PDF form on Page 2.
(English, 12/7/2002, 3220.0KB


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yours sound like memory, try the memory in another pc and see if it works
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