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P.C. Motherboard 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.Still will not boot into post. This motherboard (Asus P5KPL-VM) was purchased 14th January 2008, the manual with it is revised edition V2 September 2007.

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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

Posted on Mar 12, 2008

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M5A78L-M/USB3 error code purple


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.


















To erase the RTC RAM:









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.











Note: You may also need to remove the CMOS battery from the motherboard in some cases.

Sep 12, 2014 | ASUS Computers & Internet

1 Answer

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.

Jan 24, 2013 | E-Machines eMachines Desktop PC

1 Answer

I have bought the used hp sp323071-001 ,I want to boot by DVD-rom but it doesn't boot and the bios has got a password which I don't know what it is , I tried to reset the password by removing the...


you could try Compaq as the bios password some manufacturers place this password on there computers for maintanance reasons
or you might
On some motherboards, the battery is soldered to the motherboard, making it difficult to remove. If this is the case, you have another alternative. Somewhere on the motherboard you should find a jumper that will clear the BIOS password. If you have the motherboard documentation, you will know where that jumper is. If not, the jumper may be labeled on the motherboard. If you are not fortunate enough for either of these to be the case, you may be able to guess which jumper is the correct jumper. This jumper is usually standing alone near the battery. If you cannot locate this jumper, you might short both of the points where the battery connects to the motherboard. If all else fails, you may have to clear the BIOS password by resetting the RTC (Real Time Clock) IC (integrated circuit) on your motherboard. Many RTC's require an external battery. If your RTC is one of this type, you can clear the BIOS password just by unsocketing the RTC and reseating it. RTC's which require external batteries hope this helps

May 29, 2011 | HP Compaq Motherboard

1 Answer

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

1 Answer

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

Mar 18, 2009 | ASUS P5V800-MX Motherboard

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

Dec 03, 2008 | MSI PM8M-V Motherboard

2 Answers

P4vmm2 wont boot up


Disconnect power cord, remove the button cell battery, press the power button to dissipate any stray volts, replace button cell, plug in cord and re-boot, this will reset bios to default settings.

You will get a check sum error so enter bios to re-set date time and other settings.

May 13, 2008 | EliteGroup P4VMM2 Motherboard

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),...

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