Question about ASUS A7N8X-E Deluxe NForce 2 Ultra 400 Motherboard (90M7A770GOUAYOZ)

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PC is dead after clear the BIOS

Hi,
I've just cleared the CMOS as it's described in the manual, and now the PC is dead. When I power it up the lights on the keyboard are flashing once and that is all. No beeps or anything else. I'm using an external videocard, so I removed it. The memory also - no a beep at all. Pressing the NumLock key doesnt lit the light. The mouse is powered up. Can anyone help me somehow?

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  • iliyan_mat Sep 05, 2009

    Finaly, after one hour without batery and jumper set to clear CMOS, I was able to start it. The funiest thing is that this MB is "talking" instead of beeping. Thanks to the guys from another forum I put a headset in! Now it's time to perform some hardware tests - memory first, then the rest.
    Thanks for your advices, eventhough I already tried all of them before my post.

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Put the memory back in the computer first. (only one stick if you have more than one)

You are going to have to start with basic troubleshooting first.

TAKE notes as to where cables were etc. (digital camera would be useful here)

Disconnect all devices from the power supply EXCEPT the motherboard
Remove any extra cards including video etc.(plug monitor into the on-board)
Disconnect all drives

Power u the computer and make sure you can at least get into the BIOS.

If you hear any beeps these can indicate where the fault is.

Power up the PC and see if the fans are working.
If not then double check the power connections to the board.

If you still have no fans it is time to suspect the power supply as the probable cause.

If the fans worked then you should have gotten a display which told you there was an error and offering you a chance to go into the BIOS. ignore it and shut down the PC.

Now connect one drive only and boot again.
Repeat that until you identify the component that is giving you a problem.

Once you find the problem then remove or disconnect and carry on with the rest to see if another component might also cause a problem

If there is only one problem device then you may want to investigate that device further, Unless you don't mind replacing it

If its not the PSU and your fans are working it may suggest a problem with either the motherboard or CPU

Posted on Sep 05, 2009

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If you dis assembled your pc, make sure you have assembled it correctly. 1 cause for this is that it is grounded

Posted on Sep 05, 2009

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2. What you're describing seems more like a dead motherboard battery. Replace it and the computer should hold the time and date.

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Try clearing the CMOS --- the down side is your lose all your setting --- the up side is you should be
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Clear CMOS Jumper: CLR_CMOS1 ( Located near CMOS battery )
The motherboard uses CMOS RAM to store the basic hardware information (such as BIOS data,
date, time information, hardware password...etc.). Clear CMOS data is the fast way to go back to
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The steps to clear CMOS data are :
1. Turn off the computer, unplug the power cord from the power outlet.
2. Remove jumper cap from pins 2-3, put it onto pins 1-2 to short them.
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3. Return the setting to its original with pins 2-3 closed.
4. Plug in the power cord to your computer and turn it on.
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1 ----
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A. By Removing the CMOS Battery:

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If it fails, then try to remove the battery for at least one hour.
B. By Using the Motherboard Jumper:
Almost all motherboards contain a jumper that can clear all CMOS settings along with the BIOS password. The location of this jumper varies depending upon the motherboard brand. You should read your motherboard manual to check its location. If you don't have the manual then look for the jumpers near the CMOS battery. Most of the manufacturer label the jumper as CLR, CLEAR, CLEAR CMOS, etc.

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Below is the steps for clearing the password. Below that is the link for the manual, the picture of the jumper tabs is on pg. 153, good luck

Steps for Clearing BIOS Password Check

If users set BIOS Password (Supervisor Password and/or User Password) for a security reason, BIOS will ask
the password during systems POST or when systems enter to BIOS Setup menu. However, once it is
necessary to bypass the password check, users need to short the HW Gap to clear the password by the
following steps:
• Power Off a system, and remove HDD, AC and Battery from the machine.
• Open the back cover of the machine, and find out the HW Gap on M/B as picture.
• Use an electric conductivity tool to short the two points of the HW Gap.
• Plug in AC, keep the short condition on the HW Gap, and press Power Button to power on the
system till BIOS POST finish. Then remove the tool from the HW Gap.
• Restart system. Press F2 key to enter BIOS Setup menu.
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NOTE: The steps are only for clearing BIOS Password (Supervisor Password and User Password).

http://tim.id.au/laptops/acer/aspire%204730z%204730zg%204330.pdf

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How to remove cmos/bios password ?


A. By Using the Motherboard Jumper:
In most motherboards CMOS battery is soldered, which makes it difficult to remove the battery. In this case we use another method.
Almost all motherboards contain a jumper that can clear all CMOS settings along with the BIOS password. The location of this jumper varies depending upon the motherboard brand. You should read your motherboard manual to check its location. If you don't have the manual then look for the jumpers near the CMOS battery. Most of the manufacturer label the jumper as CLR, CLEAR, CLEAR CMOS, etc.
When you find the jumper, look carefully. There will be 3 pins and the jumper will be joining the center pin to either left or right pin. What you need to do, is remove the jumper and join the center pin to the opposite pin. e.g. if the jumper joins center pin to left pin, then remove it and join center pin to right pin. Now wait for a few seconds and then again remove the jumper and join the center pin to left pin.
Make sure to turn the PC off before opening the cabinet and resetting the jumper.

B. By Using Software:

I have found that BIOS/CMOS Password Recovery Tool is the most effective.:
BIOS/CMOS Password Recovery Tool is a program that works instantly to remove any lost or forgotten BIOS/CMOS password. Simply boot your PC to DOS and execute the program, and get access to forgotten BIOS/CMOS passwords in just seconds
BIOS/CMOS Password Recovery Tool Service: http://www.biospasswordrecovery.com/

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