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Most new computers can automatically determine the correct settings needed for your hardware, and some even store configuration data in a non-volatile Flash chip. These computers effectively do not need a CMOS battery for anything except maintaining the correct time.
Older computers, where you had to specify the parameters for the hard drive in the BIOS, need a CMOS battery. Otherwise, you would have to enter them in every time you booted the computer.
Wiki User
∙ 15y ago
Wiki User
∙ 14y agoYes, but it will not save any BIOS settings.
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How can you rectify the CMOS checksum error on your computer?
Generally, a "CMOS error" will occur if one of the following has happened:The configuration of the computer has significantly changed. Simply entering the BIOS and saving should remove the error message.The backup battery has gone dead. You can check for this by seeing if the time is incorrect in the BIOS. You would need to purchase a replacement battery.A checksum error can occur if the BIOS has been updated, or if some external program has modified the CMOS settings. Again, simply entering the BIOS and saving should fix the message.
How can I replace a windows32haldll file on a computer that won't boot up?
I need help
A computer cannot boot if it does not have the?
Basically you would need an operating system. To elaborate, you will need a bootable image that can be loaded by a bootloader.
When you turn off a computer at night it loses the date You must reenter the date each morning how do you fix it?
This is usually when your backup battery has died. Inside the computer there is (basically) a watch battery that stores information like time/date when the computer is turned off. If it doesn't get any power, it can't remember or update with the internal clock.
How do I make it so my Pentium 4 computer does not boot directly into the BIOS every time?
Once your computer boots into BIOS, you need to search around and turn off the option that is telling it to boot to BIOS automatically. Frances
If the CMOS battery dies will your system boot up normally?
if it's dead you need a new computer anyways, they're rated for 15 years or so
Why does a computer need a battery?
CMOS battery of your laptop maintains hard disk, time and date, and other drivers and configuration settings in a CMOS memory. You will see these tiny CMOS batteries connected directly to the laptop’s motherboard.
What is the software for the POST resides in a special battery power chip is called?
Actually, the POST "software" is part of the BIOS in a ROM or EEPROM chip which does not need battery power. The battery is needed for the CMOS chip that holds the boot settings.
What happens to the system if there is no internal battery in the motherboard?
CMOS (complementary metal-oxide-semiconductor) usually describes a small amount of memory on a computer motherboard that stores the BIOS settings. Powered by a small battery, the CMOS also stores time and date details, etc. If the time and date on the computer is wrong whenever the computer is booted up, then a failing CMOS battery is a likely cause - and needs to be replaced. If there wasn't a CMOS battery, or it is a dud, mains power could possibly (as happened on an old laptop of mine, so time ago!) be used to run the computer, but time and date will need to be updated manually on each reboot.
How is CMOS RAM powered when the system if unplugged?
By an external battery that is not connected to the PSU and only used for the CMOS RAM, this could be in the form of a Coin cell Battery (a silver coin shaped battery) or a barrel soldered battery. This is why the date and time settings are not lost when the computer is unplugged.
When trouble shootig a computer why might you have to enter CMOS setup?
When you troubleshoot a computer, there are a number of reasons to enter CMOS setup. Here are some specific situations.1. You may need to change the boot order. If you are having problems with the operating system and you need to install it, you will need to boot off of the installation media. If the machine is set to go directly to the C: drive, then the CD or DVD will never load. But you can change it to boot off of the CD/DVD drive first.2. If the CMOS battery dies. If the battery dies and the settings become scrambled, then you'd need to enter the CMOS settings and fix everything after changing the battery.3. If the computer locks up at random. It is possible that the memory is being clocked too fast or is using the wrong latency settings. In some cases, it may be because someone tried to overclock the CPU. So you can fix any wrong values that cause system instability.4. If you add new hardware devices. You might have to enable a hard drive socket that was disabled. Or maybe you just installed a PCI-e, generation 3 card, but it won't enter generation 3 mode. The CMOS might have a setting to enable that.
How do you reset CMOS when the computer shows CMOS error in setting?
Your motherboard a CMOS jumper, to find it you need to look through user's manual. Also in user's manual it's written what you need to do to clear CMOS memory.
How to get the CMOS battery out of a Acer travelmate 6292?
Your best bet is to remove all system batteries, and the power cord, then remove the CMOS battery, and wait like at least 20 minutes. Then put the CMOS battery back in, and then the system batteries, and power cord. You will have to set the clock, and boot order, as well as any system specific settings.I got that you have to remove the cmos battery. My Question is about just that. what comes off the back first. I have a Acer Travel Mate 6460. I am not opposed to removing the back cover and getting to the Cmos Battery. I just need to kn ow the process. I don't want to cripple the machine for ever being ignorant. I need instructions with a couple pictures or plans so I do it correctly. Do you have any plans or scematics for the Acers?Read more: http://wiki.answers.com/How_do_you_reset_your_bios_password_acer_travelmate_2420#ixzz1dhffNwrQ
When you boot the computer it ask for the current time and date and hangs what is most likely the problem?
Just about every computer keeps some information about itself internally or on the motherboard. This information includes the current time and date and a built in clock keeps it current. It does this with the help of a battery sometimes called a BIOS or CMOS battery. This battery lasts a few years but eventually will run down. The battery needs to be replaced. The battery is on the motherboard, has a shiny silvery color, is about the size and shape of an American quarter or nickel and may be secured with a small clamp or spring. You may need a small screwdriver to carefully remove it. It should be replaced with an identical or compatible battery type. The type is inscribed on the battery. If it can't be read refer to information that came with the computer, the manufacturers web site, or just search the web for your computer model and include "CMOS battery" in the search string. If the computer is a laptop or notebook device, accessing the battery is much more complicated and there is a greater risk of causing damage to the device. You should have a competent person take care of it.
How do you reduce your clock speed without turning your computer on. I changed it in the BIOS and now it wont allow me to turn on the computer?
You will need to open the cover to your PC and there should be a jumper labelled CLEAR CMOS you need to either move the black jumper accross and back again or if it is just two pins, short the pins with something momentarily. DO THIS WITH THE COMPUTER OFF. Failing this you can remove the battery (looks like a ten pence piece) leave it a few minutes and reinsert it. Then boot up.
How can you rectify the CMOS checksum error on your computer?
Generally, a "CMOS error" will occur if one of the following has happened:The configuration of the computer has significantly changed. Simply entering the BIOS and saving should remove the error message.The backup battery has gone dead. You can check for this by seeing if the time is incorrect in the BIOS. You would need to purchase a replacement battery.A checksum error can occur if the BIOS has been updated, or if some external program has modified the CMOS settings. Again, simply entering the BIOS and saving should fix the message.
The computer says the cmos checksum is incorrect please reload cmos default value how do you fix this?
you need to reset your cmos http://www.wikihow.com/Reset-Your-BIOS http://www.youtube.com/watch?v=Pdp_L5IxaNI
