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How to check for a CMOS Battery Failure?

July 4th, 2011 No comments

What is a CMOS Battery?

The CMOS battery is an important part of the computer, because it helps the computer remember its settings and about itself. It’s important that this battery is in good health. There are some symptoms which you can see for signs of a weak or dead CMOS battery.

The CMOS battery makes the CMOS memory remember settings, including date and time settings. If the battery is weak or dying, the clock will get reset to 12:00 and the date to Jan 1, every time you start the computer. The computer may also shutdown, unexpectedly. It may also ask where it should boot from, when you power it on. These are some signs of a weak, dying or dead CMOS battery.

Many computers will give a warning message about the CMOS battery, when you boot them up. Nowadays, CMOS batteries are not replaceable and are built inside the motherboards, when you see symptoms of a dying CMOS battery, you probably have to replace the motherboard. Check with your motherboard manufacturer, if you have a new motherboard, since the manufacturers consider this a defect. You may be eligible for a replacement motherboard.

CMOS_Battery0

This battery is connected to the south bridge chip, to power both CMOS memory and RTC circuits. You can see the CMOS battery within its motherboard socket in the above picture.

RTC_Chip 

The above is an example of a south bridge chip. The CMOS memory and the Real Time Clock (RTC) are both embedded in this chip, nowadays.

CMOS_Battery4    CMOS_Battery3

Recognizing CMOS Battery Failure

When your computer starts up, the BIOS may give a warning message like "CMOS checksum error, defaults loaded". It will also tell you to press a key to enter the BIOS or just continue. Go into the BIOS and change the date/time and other settings that need to be changed. Then, save and quit. After restarting, if you still get the above message, you should replace the CMOS battery.

If you don’t get any such warning, check that the time and date on your system is correct. If the time resets to 12:00 and date resets to Jan 1, this is an indication of a dying CMOS battery and you should replace it. You should first confirm this by setting the time and date in your BIOS. If they reset again after restarting the computer, replace the battery.

If the computer suddenly shuts down or you get hardware errors like not detecting the hard drive, CD drive and RAM, this may cause the computer to shutdown. First check that all the cables are properly plugged in. Then, remove and re-insert the RAM. If the system still shuts down, you should try to replace the CMOS battery first, since it’s cheaper than trying to replace other parts.

Check the CMOS battery voltage, if you have a multimeter. The voltage across a good battery should be about 3 volts. When it’s below 2.5 volts, it may start giving problems. If the battery voltage is below 1.8 volts, the battery is dead.

Replacing the CMOS battery

When you remove the CMOS battery, all the hardware settings stored in the CMOS memory are lost. So, you should record or note down the CMOS settings before removing the battery. Go into the BIOS by pressing the required key (mostly F1, F2, Del or F10). Note down any customized settings like hard drive configuration, CPU speed adjustments or port activation/deactivation etc. Then, shutdown the system and unplug.

When you have replaced the battery, enter the BIOS once again and select "Load BIOS Setup Defaults". (Depending on your BIOS Manufacturer, you may have "Load Standard Defaults", "Load Fail-Safe Defaults" or just "Load Defaults"). Then, reconfigure the customized settings that you noted earlier. Save the settings and exit the BIOS.

AMIBIOS_MainScreen

Replacement CMOS batteries can be purchased at any electronics stores or online. Compare the engraved serial numbers before purchasing the battery.

Remove power and discharge static electricity before touching delicate electronics.

Below are links to some videos on how to remove and replace a CMOS battery:

How to replace your PC’s battery

CMOS battery replacement

Relay Timer Lite Driver Update

December 8th, 2009 No comments

Relay Timer Lite is a useful application for NCD ProXR relay controller boards. It is compatible with one board that has eight relays. Every relay can be set separately with several timers. The relay can be turned on/off manually with its user interface. It can detect all existing COM ports automatically. It is a specialized program that gains control of peripheral devices, and the conditions of all relays can be displayed and operated at the same time.

Relay Timer 2.1 (December 08, 2009) is developed using the latest technology from Windows. It supports Windows 95, Windows 98, Windows 2000, Windows 2003, Windows NT, Windows XP, Windows Vista as well as 64-bit Windows operating system. It can control the relays with its accurate timer, while it uses the processor’s resource at very low rate. It is strong, synchronized and convenient. You can download the trial version on this link or you can purchase its full version here for only $169.00.

 

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VIA Hyperion Pro Driver Update

August 10th, 2009 No comments

VIA Technologies Inc. is one of today’s leading suppliers of core logic chipsets, advanced connectivity, multimedia, low power x86 processors, networking and storage silicon for your personal computer. The manufacturing company also provides complete platform solutions and innovative driving system for computer users.

VIA Hyperion Pro drivers, is one of the companies latest products which has been released in the market in August 10, 2009. The package supports both 64-bit Microsoft Windows Server 2003 and 64-bit Microsoft Windows XP, and also includes SATA/RAID drivers for your computer.

Click on the link if you are looking for a utility tool for your computer’s motherboard, or if you want a software program that will automatically check and install driver updates on your laptop.

 

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CrystalCPUID Driver Update

May 9th, 2009 No comments

The CrystalCPUID is a useful application from hiyohiyo that shows comprehensive data regarding the cache, bios and the chipset. This software has a real time clock verifier and it works for the modification of the multiplier and systems voltage having processor platform of AMD K7/K8.

CrystalCPUID key features are: Change Wallpaper, EM64T/AMD64 Support, Change Dialog Font, SpeedStep Control from Intel, Change Dialog Font, Control for Voltage/GeodelX Multiplier, K8/K6/K7 AMD, BIOS Information, Multiplier Control for VIA C3/CyrixIII, Chipset/VGA information, Multiplier Management, PCI Device List, MSR Walker/MSR Editor, Multi-Processor, Clock, Code Name, Cache, Process Rule, System Clock, CPUID, Multiplier and Feature Flags.

Crystal CPUID is a CPU identification utility which is advanced in displaying comprehensive data regarding processor/s. Supplementing the information of the entire CPU it lets you see all features that are supported such as the BIOS data, cache and chipset. It also includes advanced features like AMD K6/K7/K8/GeodeLX Multiplier/Voltage control and VIA CyrixIII/C3 Multiplier control, Intel SpeedStep control. This also includes an installation-free Standalone real-time CPU timer.

This latest update of CrystalCPUID 4.15.5.452 version was added May 9, 2009 and was released May 8 of the same year. This application works on Windows NT 4, Windows 2003, Windows Me, Windows, 98, Windows 95, Windows 2000, Windows Vista and Windows XP.

CrystalCPUID is a motherboard driver that costs nothing to download so you can use it right away and for as long as you want to. You can download your updated CrystalCPUID here to start using its features and experience its benefits today.

 

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