Question about ASUS P4P800-MX Motherboard

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Will not power-up after a shut down unless the CMOS is cleared.

I'm forced to clear the CMOS after a shutdown to get the PC to power up. I'm clearing the CMOS by turning off the PS, removing the battery and moving the jumper to pins 2-3. After waiting about 10 seconds, the battery is re-installed and the jumper is set back to pins 1-2 and the PS is turned back on. On boot up, F2 is required to reset the BIOS; the PC will then boot correctly.

If I leave the battery out and perform a shutdown, the PC will power up without clearing the CMOS as state above, but I still have to press F2 to continue booting.

I have replaced the battery with a new one, but problem continues to occur. If I restart instead of shutdown from within Windows, there's no problem.

Any idea what's causing this to happen?

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  • 3 more comments 
  • Gary O Jul 14, 2008

    Custom built. What info do you need?



  • Gary O Jul 14, 2008

    The problem has been resolved.



    I discovered that the CMOS jumper was missing the internal metal
    connector. It must of fell out of the plastic housing somehow.
    Replacing the jumper resolved the problem.



    What are the odds of something like this happening?



  • Michael Ortega
    Michael Ortega May 11, 2010

    I think we could've been here for awhile trying to find that one. Good job for finding it.



    MO

  • Michael Ortega
    Michael Ortega May 11, 2010

    What's the model of the motherboard itself?



    Was the computer ever functioning properly without the startup annoyance?

  • Michael Ortega
    Michael Ortega May 11, 2010

    What's the computer model?

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  • 284 Answers

Try swapping the Ram Chips "Memory" try running it with less memory or if you have multi chips take a few out and run it

Good luck

Please rate US! thanks

Posted on Jul 14, 2008

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Lenovo t410 reset bios password


Follow these steps to clear the password:
NOTE: These steps also clear CMOS.
1. Shut down the computer. If you are unsure whether the computer is off or in Hibernation, turn the computer on, and then shut it down through the operating system.
2. Disconnect all external devices connected to the computer.
3. Disconnect the power from the computer by first unplugging the power cord from the AC outlet and
then unplugging the AC adapter from the computer.
4. Remove the battery
5. Remove the real-time clock (RTC) battery
6. Wait approximately 30 minutes.
7. Replace the RTC battery and reassemble the computer.
8. Connect AC power to the computer. Do not reinsert any batteries at this time.
9. Turn on the computer.
All passwords and all CMOS settings have been cleared.

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Asus will not turn off after shutdown


All these things point to the bios. You need to go to the Asus site for that motherboard and download an upgraded bios. There will be directions there on how to update your bios, probably both from Windows and from the system prompt.

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Please clear cmos if system no display after overclocking


Click the following picture to enlarge:
pctech1_0.png

CPU Overheated
If the system shutdown automatically after power on system for seconds, that means the CPU protection function has been activated. When the CPU is over heated, the motherboard will shutdown automatically to avoid a damage of the CPU, and the system may not power on again.

In this case, please double check:
1. The CPU cooler surface is placed evenly with the CPU surface.
2. CPU fan is rotated normally.
3. CPU fan speed is fulfilling with the CPU speed.

After confirmed, please follow steps below to relief the CPU protection function.
1. Remove the power cord from power supply for seconds.
2. Wait for seconds.
3. Plug in the power cord and boot up the system.

Or you can:
1. Clear the CMOS data.
2. Wait for seconds.
3. Power on the system again.

If after clearing the CMOS you still have no display, you may have damaged your motherboard, CPU, or RAM. If you need further assistance with this Motherboard, let me know.

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Changed cpu multiplier from 17 to 19 now have blank screen on foxconn a88gmx, cant reset as cannot access bios


Try clearing the CMOS --- the down side is your lose all your setting --- the up side is you should be
able to access your BIOS

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
factory default when the BIOS settings were mistakenly modified.
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.
This will clear CMOS data.
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.
5. Go to BIOS Setup to configure new system as described in next chapter.
Clear Jumper on pins 1 & 2
1 ----
2 ----
3
Normal
(Default)
1
2 ----
3 ----
CLR_CMOS1
  • Disconnect the power cable before adjusting the jumper settings.
  • Do not clear the CMOS while the system is turned on.
WARNING!
Jumper Diagram Definition Description
1-2 Set Pin 1 and Pin 2 closed
2-3 Set Pin 2 and Pin 3 closed

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DEAR IF YOU DONOT KNOW ABOUT THE JUMPER YOU WILL SEE A CELL .A CELL OF THE SIZE OF A COIN OR PEPSI LID. PUT IT OUT BUT DONOT FORGET TO SWITCH OFF THE MAIN(I DONOT MEAN TO SHUTDOWN THE PC I MEAN SHUTDOWN THE PC AND ALSO UNPLUG THE MAIN POWER SUPPLY) NOW PUT OUT THE CELL AND PUT IT AGAIN IN ITS LOCATION CARFULLY AFTER A MINUTE AND YOU WILL SEE THAT THE CMOS IS CLEARED NOW

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Here's a link to the manual if you want specifics.


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1 Answer

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cmos battery ?? is still fuctioning???

try to replace it..

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that are some causes of system hang up hen you are in boot up.. the main source of system hang up is system corruption,or system error...

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1 Answer

Clear BIOS pwd micron gx3 notebook


Set the Cmos jumper to clear. Power up the pc. Power down the PC. Set the Cmos jumper back to normal position, power up the PC.

http://www.dansdata.com/images/io006/cmosclr500.jpg


Or take out the coin battery and replace it after 10 seconds.

http://www.hardwarezone.com/img/data/articles/2003/726/bios-clear-jumper.jpg

Note, all bios settings will be set to default. So be aware of some possible issues you may need to correct in bios after the reset.

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1 Answer

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Clear RTC RAM (CLRTC)

This jumper allows you to clear the Real Time Clock (RTC) RAM in CMOS. You can clear the CMOS memory of date, time, and system setup parameters by erasing the CMOS RTC RAM data. The onboard button cell battery powers the RAM data in CMOS, which include system setup information such as system passwords.
1. Turn OFF the computer and unplug the power cord.
2. Move the jumper cap from pins 1-2 (default) to pins 2-3. Keep the cap on pins 2-3 for about 5-10 seconds, then move the cap back to pins 1-2.
3. Plug the power cord and turn ON the computer.
4. Hold down the <Del> key during the boot process and enter BIOS setup to reenter data.

Except when clearing the RTC RAM, never remove the cap on CLRTC jumper default position. Removing the cap will cause system boot failure!If the steps above do not help, remove the onboard battery and move the jumper again to clear the CMOS RTC RAM data. After clearing the CMDS, reinstall the battery.

You do not need to clear the RTC when the system hangs due to overclocking. For system failure due to overclocking, use the CPU Parameter Recall (C.P.R) feature. Shut down and reboot the system so the BIOS can automatically reset parameter settings to default values

Mar 18, 2009 | ASUS P5V800-MX Motherboard

1 Answer

Please help me


Hi

Check ASROCK P4i45GV R5.0 User Manual Page 17 - http://download.asrock.com/manual/P4i45GV%20R5.0.pdf

Note: Check Page 11 for the CLRCMOS0 location on the motherboard. From the picture CLRCMOS0 is number 18. You can locate CLRCMOS0 just below the CMOS Cell Battery.

Turn off the computer and unplug the power cord, then use a jumper cap to short the pins on CLRCMOS0 for 3 seconds. Please remember to remove the jumper cap after clearing the CMOS. If you need to clear the CMOS when you just finish updating the BIOS, you must boot up the system first, and then shut it down before you do the clear-CMOS action.

Regards
Mike

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