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Home / I Changed the Batter for Cmos Setting if I Unplug Computer It Comes Back With Settings Wrong Again

I Changed the Batter for Cmos Setting if I Unplug Computer It Comes Back With Settings Wrong Again

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You don't have to abandon send when your laptop starts to malfunction. HP laptops enable you to brand upgrades when a piece of hardware needs replacing. You don't always demand to shovel out greenbacks for a brand new laptop. Just buy a replacement part and install it...with caution.

If you lot've owned your laptop for several years, it's possible your figurer is malfunctioning considering the CMOS bombardment died. The CMOS battery is a slice of hardware that's unique to laptops. When it dies, it could crusade your laptop to meet problems booting up.

Thankfully, it's easy to install a new CMOS battery in your laptop. Here we'll swoop into three topics:

  1. What does a CMOS battery do?
  2. How do I diagnose a CMOS battery failure?
  3. How do I supersede the dead CMOS battery with a new one?

Await, my laptop has more than ane battery? In curt, yes. While the main laptop bombardment powers all of the components from the CPU to the hard drive and tends to exist i of the largest and heaviest parts of your laptop, a CMOS battery powers just the BIOS, and is usually coin-sized and lives on the motherboard.

Calculator BIOS

To empathise the importance of a CMOS battery, you lot offset demand to understand what your computer BIOS is.

Every computer has BIOS pre-programmed into its hardware. Information technology's different than an operating organization. Operating systems can be installed, uninstalled, and updated long after you've bought the computer. BIOS is something that's integrated into the figurer while information technology'south being manufactured.

BIOS stands for "Bones Input/Output System." What exactly does it exercise? Basically, it manages the essential functions of your figurer.

All computers function through a procedure of inputs and outputs. Let's say, for example, that y'all're opening upwards a software program:

  1. Your CPU sends an didactics to your hd to retrieve the software programme from storage; that's an input.
  2. Your hd retrieves the software program data and sends it back to your CPU; that's an output.
  3. Your CPU runs the program. It sends instructions to your graphics processor telling it what image needs to be created; an input.
  4. Then your graphics processor sends instructions to your monitor telling it how to accommodate the pixels on the screen to create the image; an output.

Everything your reckoner does tin can be boiled downward to an input or output. The BIOS is tasked with managing your figurer's exchange of inputs and outputs, mostly when yous're booting upwardly your reckoner. BIOS instructs your reckoner on how to boot up the operating organization, and information technology besides operates the peripherals (like the mouse and keyboard) [1].

You press the power key to plough on your laptop, correct? Well, how'south your laptop supposed to process the power key when the laptop is turned off? That'southward what the BIOS is there for. It performs basic functions for your reckoner while your estimator is nevertheless waking up. Pressing the ability key is a basic input. Booting upwardly your operating organization is the basic output.

If you're a PC gamer, you might exist interested in learning how to overclock your computer to heave your processing speed while you're gaming. Y'all can plan your reckoner for overclocking by adjusting the BIOS settings. Nosotros'll teach you how to use BIOS to overclock at the end of this article.

Laptop CMOS chip

CMOS stands for "Complementary Metal Oxide Semiconductor." The CMOS bombardment powers the BIOS firmware in your laptop [2].

BIOS needs to remain operational even when your computer isn't plugged into a power source. That's where the bombardment comes in. When your computer gets unplugged, BIOS relies on the CMOS battery for power.

You'll find CMOS batteries in both laptops and desktop PCs, but it's used more than frequently in a laptop. That's considering laptops are usually unplugged for a longer corporeality of time than desktop PCs. Most desktop PCs are unplugged from their power source very infrequently.

The CMOS battery gets charged whenever your laptop is plugged in. It's only when your laptop is unplugged that the battery loses accuse. Nearly batteries will last two to ten years from the date they're manufactured. The more you lot leave your laptop plugged in, the longer your battery will last.

How do I know my CMOS battery failed?

Here are the CMOS battery failure symptoms:

  • The laptop has hard booting up
  • In that location'due south a constant beeping dissonance from the motherboard
  • The date and fourth dimension take reset
  • Peripherals aren't responsive or they don't respond correctly
  • Hardware drivers have disappeared
  • You tin't connect to the net

When your CMOS battery fails, your BIOS firmware volition close down and revert to its default settings [three].

Kicking up problems and incessant beeping

As we mentioned previously, BIOS is largely responsible for booting upwardly your calculator. Without the battery, your laptop may have a very hard time booting upwards or information technology may non boot up at all. You likewise might hear a constant beeping racket from the motherboard, another indication of a battery failure.

Fourth dimension and date from long, long ago

If your laptop manages to boot, you might detect that the date and time have reset. Most likely, they've reset to a date long in the past. Even when your reckoner is shut off, BIOS maintains a real-time clock that tracks the date and time. CMOS (which is sometimes referred to as a real-fourth dimension clock, in and of itself) is responsible for maintaining that procedure. So if the date and time take mysteriously reset, that'due south a very practiced sign that the CMOS bombardment died.

Keyboard acting wonky

It's possible that your peripherals don't respond - y'all can't move your cursor or click on any icons or the laptop won't read any of your keyboard inputs.

Or, your peripherals could be thrown out of whack; your cursor is inaccurate and your key inputs prompt strange responses from the operating system.

Or, your customized keyboard configuration has reset to the default one. These are all signs of CMOS failure, since BIOS is responsible for managing peripherals at startup.

Drivers disappear

If you've installed any drivers on your computer, like those used for your abode printer, a CMOS failure may cause those drivers to disappear (you'll have to re-download and re-install them).

No internet connexion

Bombardment failure may too prevent you from connecting to the internet. BIOS is tasked with maintaining hardware and network drivers.

One matter you should be relieved about is that CMOS failure typically won't cause yous to lose any of your personal files. Nothing in storage is afflicted. You'll still have all of your pictures, videos, and documents waiting for y'all as soon equally you've replaced the battery.

How to remove and supersede the CMOS bombardment

Allow's remove that pesky ol' CMOS battery and replace it with a new one. It's a relatively simple process. Yous'll just demand a few supplies:

  • Screwdriver (Phillips or flathead, depending on the type of laptop yous have)
  • Compressed air
  • New CMOS battery
  • ESD mat

Yous tin buy a new CMOS bombardment online for a very reasonable price, unremarkably between $one and $10. They are also bachelor, along with ESD pads, at many local retailers like Target, Fry's Electronics, Best Purchase, and office supply stores.

1. Find a good workspace

Your laptop components can be damaged past electrostatic discharge (ESD). To avoid edifice upwardly a charge, don't work on a carpeted surface. Work on a flat, hard surface. In fact, it's best to piece of work on a conductive foam pad, if possible. These pads will forestall ESD.

Information technology's possible that at that place's static electricity in your easily. Before you start working, rub your hands on a metallic surface to get rid of the charge. Better all the same, if you accept an anti-static wrist band you probably want to put that on for this DIY projection.

ii. Disconnect everything

Shut downward your computer and unplug information technology from its power source. Unplug any and all cables from the laptop, including peripherals.

iii. Remove the laptop casing

Flip the laptop over. Employ the screwdriver to remove the screws holding the laptop casing in place. Remove the casing once you've unscrewed it.

Notation that on some laptops, there's but ane large casing that needs to be removed. On other laptops, in that location are several smaller casings that give you access to different estimator components. If you're not sure which casing gives you access you lot what, yous might need to unscrew all the casings and do some exploring.

Pro tip: Have a couple of small bowls to hold the screws you lot remove. Recollect, y'all'll need to find them all when information technology's time to put them dorsum in so y'all don't want them rolling off the table and getting lost.

4. Remove the battery

You don't want the computer to accidentally plough on while you're working on information technology. Unremarkably, the battery is long, heavy, and shaped something similar a brick.

5. Remove the CMOS bombardment

By this point, you should see the motherboard. Be very careful when you're working around the motherboard. This is the most important hardware in your computer and you could seriously damage the laptop if you damage the motherboard.

The CMOS battery is shiny and round. It looks like a push button or money, and it's ordinarily placed inside a minor holding socket. Remove the CMOS battery - information technology slides out of the socket only similar the batteries in your mouse.

Pro tip: Earlier you remove it, make sure to have note of the battery's orientation so you know which fashion to put in the new one.

6. Insert the new battery

Place the new battery in the same location. Make sure you identify the new battery in the exact same orientation equally the old one.

7. Reattach the casings

Rescrew each of the casings within the computer. Reinstall the bombardment. Supplant the exterior casing.

8. Examination the laptop

Plug your laptop back into its ability source and turn it on. BIOS should take defaulted back to its original settings, and then don't be alarmed if the date and time are nonetheless incorrect, or if there are drivers missing. You volition demand to reset the time and reinstall the drivers.

Pro tip: Your laptop shouldn't accept any problem booting up at present. If it does, it might be your BIOS firmware that's faulty and not your CMOS.

How to replace the CMOS bombardment in a desktop reckoner

Have a desktop computer with a CMOS issue? Read HP's quick guide on how to supersede the CMOS battery in a desktop computer. It'southward fifty-fifty easier to replace the battery in a desktop considering desktop computers usually have a more accessible motherboard.

Use BIOS to overclock your calculator

All computers take a programmed "clock speed." Clock speed refers to how fast a computer processor can read incoming electrical pulses of information. The near powerful processors have fast clock speeds.

If y'all're a PC gamer or a artistic professional person, yous desire an ultra-fast processor. PC games and artistic applications, like the Adobe Creative Suite, crave your CPU to process and return large quantities of information in a short amount of time. If your processor isn't fast enough to handle all this data, you might endure from lag and delays. Manifestly, lag is a existent killer when you're gaming.

Some processors let for overclocking. Overclocking is when your processor operates at a faster speed than what information technology was programmed for. Hardcore gamers dearest overclocking because it improves game performance. Y'all can activate overclocking via BIOS. Since we've been discussing all things BIOS, we might as well share some overclocking secrets to help you boost your processor speed.

Exist warned: overclocking may void your PC's warranty. It may too crusade your calculator to overheat, which is why yous must pay attention to how hot your computer gets when you're running intensive programs.

It the oestrus beingness ventilated from the estimator is very noticeable, you should have a pause and plow the computer off for a while then it tin can cool down. Overheating can harm your interior components.

To activate overclocking on Windows 10:

  1. Go to Settings —> Update & Security —> Recovery
  2. Under "Advanced Startup," click "Restart at present"
  3. Your calculator will restart, and information technology volition give you access to BIOS settings when it starts back up
  4. You lot need to change the CPU frequency; depending on your figurer, there will be an option for "Cell Bill of fare," "Ai Tweaker," "CPU Settings," "Frequency Controller," or "MB Intelligent Tweaker. Click whichever one appears on your BIOS settings tab.
  5. Click the "Adjust CPU Ratio" option
  6. Click on the "Auto" setting and press "Enter"
  7. You lot'll be given a list of alternate settings; cull a number college than the existing setting and press "Return"

Again, these settings may expect entirely different depending on the calculator you're using. No matter what computer you have, merely know that you demand to access the settings that allow you to increment your CPU frequency/clock speed. Yous may need to exercise some experimenting. Be certain not to push your processor until you know that you lot adapted the settings correctly.

Some CPU manufacturers make it easier for you to overclock, and they may include "auto-overclocking" options you tin can select.

Read this guide on overclocking for more information.

The CMOS battery powers your laptop's BIOS firmware, which is responsible for booting up your reckoner and configuring information period. Yous tin tell if your CMOS bombardment has died if your laptop has hard booting up, if drivers disappear, and if your laptop's appointment and time are wrong.

Replacing a CMOS battery is a very simple set. Don't panic if y'all're having rebooting troubles. Before you accept your computer in for maintenance, get a screwdriver and a new battery and try swapping out the old one. It'due south a fast, easy DIY project and could save you lots of money in labor costs.

To recap

The CMOS bombardment powers your laptop's BIOS firmware, which is responsible for booting upwardly your estimator and configuring information flow. Y'all can tell if your CMOS battery has died if your laptop has difficult booting up, if drivers disappear, and if your laptop'southward date and time are wrong.

Replacing a CMOS battery is a very uncomplicated fix. Don't panic if you're having rebooting troubles. Before yous take your computer in for maintenance, get a screwdriver and a new battery and try swapping out the old one. It's a fast, like shooting fish in a barrel DIY project and could save you lots of coin in labor costs.

[i] HowStuffWorks.com; BIOS
[two] ComputerHope.com; CMOS
[3] Techwalla.com; What Happens When a CMOS Battery Dies?

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Source: https://www.hp.com/id-en/shop/tech-takes/post/what-is-cmos-battery-how-to-remove-and-replace

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