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P.C. refuses to boot. After 4weeks stopped booting with a check sum bios error. Have cleared cleared RTC RAM . The battery was only showing 1.68 Volt so have changed it. This motherboard (Asus P5KPL-VM) was purchased 14th January 2008, the manual with it is revised edition V2 September 2007.

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  • donita149 Mar 12, 2008

    Have tried that.

  • donita149 Mar 13, 2008

    No, still got a check sum error

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You should re-flash the BIOS on the mobo

Posted on Mar 12, 2008

  • 1 more comment 
  • Matt Jurach
    Matt Jurach Mar 12, 2008

    Get the latest BIOS update (v.0608, released Jan '08) from ASUS.

  • Matt Jurach
    Matt Jurach Mar 12, 2008

    Did the BIOS update successfully?

  • Matt Jurach
    Matt Jurach Mar 13, 2008

    So it sounds like you cannot even access the BIOS? It just immediately reports a checksum error as soon as you power on? No successful POST?

    Clearing the RTC RAM only erases stuff like the date and your custom BIOS setting entries. It doesn't affect the BIOS itself.

    If the BIOS has been corrupted in such a way that you cannot re-flash it, then the entire mobo is, unfortunately, toast.


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Emachine T 5212, when i turn it on,, a siren sounds,,then computer shuts off


In your computer (as well as other gadgets), the battery powers a chip called the Real Time Clock (RTC)chip. The RTC is essentially a quartz watch that runs all the time, whether or not the computer has power. The battery powers this clock. When the computer boots up, part of the process is to query the RTC to get the correct time and date. A little quartz clock like this might run for five to seven years off of a small battery. Then it is time to replace the battery.

This does not explain why your computer would not boot, however. You would expect the computer to boot fine but have an incorrect time and date. The reason your computer would not boot is because the RTC chip also contains 64 (or more) bytes of random access memory (RAM). The clock uses 10 bytes of this space, leaving 54 bytes for other purposes. The BIOS stores all sorts of information in the CMOS RAM area, like the number of floppy and hard disk drives, the hard disk drive type, etc. If the CMOS RAM loses power, the computer may not know anything about the hard disk configuration of your machine, and therefore it cannot boot.

Many more modern computers are not quite so dependent on the CMOS RAM. They store the settings innon-volatile RAM that works without any power at all. If the battery goes dead, the clock fails but the computer can still boot using the information in the non-volatile RAM area. I would change the battery and make sure unit is unplugged and my other hand is touching the metal frame on the computer to stop static discharge. Blow out the inside of the computer completely.Start computer with case off and make sure all the fans run and don't sound like a siren.Replace anything not running.It may not boot if the BIOS can't see the hard drives. You might have to start computer and watch the screen and when it asks you to hit a key to get into like the bios do it and see if you can reset it. If nothing seems be running right maybe the power supply went out they are real cheep at Tiger Direct.

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After bios update aspire 4410 not boot


nplug computer, set jumber to reset RTC and remove batery.Remove every device on the PC including peripherals except for CPU, 1 stick of RAM, DVD OR FLOPPY (whichever you will reflash from).Plug PC and power on [YES, with battery OUT and jumper still on RESET RTC], hold delete (MUST USE PS/2 Keyboard) if you're lucky you'll be able to enter the BIOS and use EZFLASH to reflash BIOS, it supports USB thumb drive provided it's formatted to FAT.Reflash (the flash could have been successful but they released a bad buggy BIOS, if so then reflash with the earlier version) After flashing the PC will reset itself DO NOT INTERFERE! When the computer boots up you should expect a CMOS error message (it's normal because you just reflashed).Power off, unplug PC, replace battery and return RTC jumbers to normal.Reconnect everything and plug PC back in and power on and enter BIOS settings.

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Mainboard P4P8T doesn't boot.


doesn't boot? what you want to do? you want install something, or you want open the computer?

make it clear you problem!

otherwise, if not booting from the cd or dvd, use anothe dvd but check first boot manager from the bios... then if its okay.. use anothe dvd or cd room....

Sep 11, 2009 | ASUS T2 P4P8T WO/CD/MDM FM AGP8X GETH WIFI...

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Unable to strart windows


Clear Real Time Clock (RTC) RAM by way of the jumper. This jumper allows you to clear the RTC RAM in CMOS. To clear RTC RAM :
  1. Turn off the computer and unplug the power cord.
  2. Open the chassis.
  3. Remove the on-board battery.
  4. Move the jumper cap from pins 1-2 (default) to pins 2-3 for about 5-10 seconds, then move the cap back to pins 1-2.
  5. Reinstall the battery.
  6. Plug the power cord and turn on the computer.
  7. Hold down the <DEL> key during the boot process and enter BIOS setup to re-enter data.
  8. Start setup again and make sure your setup disc is not corrupted.

Aug 23, 2009 | E-Machines T2893 PC Desktop

1 Answer

Will removing the CMOS battery clear the BIOS


it's about the processor level caches
but also might be a bad memory slot (RAM)

resetting the bios is a good choice, maybe this will helpe either

Jul 01, 2009 | Acer Computers & Internet

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Chassis intruded!!


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

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Chassis intruded asus m3a78-cm


I actually did a little research on this one. I downloaded the User Manual for this board. USUALLY, there is a jumper on the board somewhere that needs to be set in the correct position. I looked through the manual and can't find a jumper for this . I even looked through the bios setting just in case it might be covered there, no luck. If you can't find an undocumented jumper on the board somewhere labeled something like TRPWR, then I would try the reset next. My suggestion would be to use the LCRTC jumper to reset the board. Heres the procedure according to page 1-17 of your manual:

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.

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1 Answer

I am getting 1 long beep and then 6 short ones


Hi canturob,
When a system reports a check sum error the bios is telling you the information stored from the last working boot does not match the current settings stored in the bios. Please power down your MSI system, unplug the power cord. Open the case & clear the bios. Location of JBAT1 on page 3 in manual.
Clear CMOS Jumper: JBAT1 page 10 in the manual. Remove the battery/cmos. Check it's voltage with a volt meter. It should test to 3volts DC. Anything less & the battery needs to be replaced.
While in the case re-check all data cables & power cables for good connection.
The MSI board uses the Award bios. Your current beep code of 1 long & six short is not a common beep code for the Award bios. See bios beep codes here: http://www.bioscentral.com/beepcodes/awardbeep.htm

If the battery checks out ok, you may need to update the bios. Go to MSI: http://global.msi.com.tw/index.php?func=downloaddetail&type=utility&maincat_no=1&prod_no=205
To update your MSI bios (Option only if bios clear fails to resolves the check sum issue).

Good luck canturob!
Mike

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1 Answer

Not able to log on to laptop


link to manual
Remove battery
remove hard drive
remove keyboard
remove keyboard bezel
disconnect RTC Battery (Back-up Battery)
press power on switch to dissipate voltage
reconnect RTC Battery
re-install bezel
re-install keyboard
re-install hard drive
re-install battery
re-boot check sum error enter bios set-up
change date time etc

Apr 19, 2008 | IBM ThinkPad R52: R52 P M 760(2.0GHz),...

1 Answer

P.C. Motherboard


your best bet is to have it replaced , you only purchased it in January 08, the battery was a fair indication it was not ok

good luck with that
Terry

Mar 12, 2008 | Computers & Internet

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