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Removing an Acer 4422-5237 cmos battery

A 4420-5237 model

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  • Acer Master
  • 7,627 Answers

This isn't your model, but it will give you the basic procedure, what were the engineers thinking? http://www.youtube.com/watch?v=dxtA6Jk6Ouk

Posted on Jan 12, 2013

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Goodluck!

Posted on Jan 02, 2017

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hokuwho
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SOURCE: Acer Travelamte 515 TE cmos battery replacement

All older laptops have the CMOS/RTC battery under the keyboard and usually not in easy access as laptop theft was an issue from day one (password reset). After the keyboard is lifted then either look to the front or rear for two little twisted wires connecting the battery to the motherboard. Some older laptops even have two. And since Acer is a less than supportive manufacturer with a perpetually busy website you might even try looking on EBay for a parts only offering that shows pictures of the motherboard.

Posted on Oct 19, 2008

leecom72
  • 4806 Answers

SOURCE: Acer travelmate 4650, after bios flashing, no display.thanks.

HI there
Sounds like the bios flash has failed, the only thing you can do now is try to flash again, make sure you have the right bios update for that model machine, suggest you get a USB floppy drive so you are able to re-flash the bios, if it still doesn't work then the machine is rendered useless.


Good luck and thanks for using Fixya!!!

Posted on Feb 11, 2009

parrotheadpc
  • 2600 Answers

SOURCE: acer 5610z need to locate cmos battery for bios password reset

If you have forgotten your BIOS or system password, there are no software tricks or magical gimmicks that will get the password cleared. Laptops are different in that they are designed to not work with “backdoors” etc. for security reasons. There is one true way that works most of the time and that is hardware.
The Cmos (RTC) battery that is mounted on the motherboard in most cases holds the key, if your motherboard has the battery that is connected to the motherboard by using a two wire socket that plugs into the MOBO, then here is the procedure.
On the motherboard where the battery plugs into, you will see two pins sticking straight up, these engage the plug on the battery side. These two pins have to be “shorted” and then the motherboard powered up for approx. 30 seconds, then power down the system and replace the Cmos battery and reboot. Your password problem should be cleared up. The best way to “short” the pins is get another cmos battery and cut the wires from the battery part, bare the ends and twist together, this will short the pins. Make sure you tape the connection good on the jumper you just made….don’t want to touch anything else with powered up bare wires. Below is the link to your service manual that will point everything out to you. Good luck.

http://tim.id.au/laptops/acer/aspire%205610%20travelmate%204200.pdf

Posted on Sep 24, 2009

  • 1 Answer

SOURCE: Acer extensa 5630ez won?t turn on.

Can you give a location of R138?
Is it on the easy side? E.q. the side of the motherboard wich is accessible by removing the bottom plate? I see Q24, located close to CPU. If possible, post a picture of R138, with some components visible.

Posted on May 11, 2010

SOURCE: I cannot remember the password

cmos bateryy resets just the ios passwords. For windows , press f5 uittill the system is booting, enter in safe mode, go to control panel, accounts and set a new password for your account

Posted on Mar 24, 2011

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3 Answers

Aspire x1800


Setting up a password on the Acer Aspire prevents others from accessing the computer without permission.

If the user is unable to supply the correct password at startup, the computer will lock the hardware and fail to boot.

This security measure is a useful feature, but it can create serious problems if you forget the password.
Basics

The Acer Aspire stores the password in a component called the complementary metal-oxide semiconductor.

This component is integrated into a random access memory chip embedded on the motherboard. The CMOS holds data that the basic input/output systema critical software utility that controls how the computer operates at startupaccesses when the computer boots.

If the BIOS detects that a password is registered in the CMOS, it will prevent the computer from booting until the user enters the password correctly.

Depending on which model of Acer Aspire you own, you may be able to clear the CMOS manually.

Contact Acer before attempting to clear the CMOS, as opening the computer without permission could void your warranty.

Desktop Models

Some Acer Aspire desktop models come with a jumper that is used to clear the password and other settings stored on the CMOS.

This jumper is located on the motherboard and is often found next to a label such as "JBIOS1" or "CLR_CMOS." To clear the CMOS using the jumpers, turn off the computer, disconnect the power cable and remove the case cover.

Remove the jumper shunt from pin 1 and pin 2; then place the shunt on pin 2 and pin 3. Return the shunt to its initial position after 10 to 15 seconds.

If the Aspire doesn't come with a jumper to reset the CMOS, the CMOS can be reset by removing the lithium coin-cell battery instead.

Removal is accomplished by pushing down on the tab securing the battery to the motherboard and lifting the battery out of its slot.

Leave the battery out for 24 hours, and then return it to its original position with the positive sign facing up.

Laptop Models

Resetting the CMOS password on an Acer Aspire laptop is much more difficult than resetting the password on a desktop.

Disassembly steps vary from model to model, but on most models, you'll have to take apart the computer to access the CMOS battery.

Don't take apart the notebook if you don't have experience disassembling PCs.

After turning off the computer and disconnecting the AC adapter, take out the battery (different from the CMOS battery).

All visible screws must then be removed from the bottom of the notebook.

Remove all components stored to their separate compartments on the base of the notebook.
Turn over and open the PC.

Lift up the switch cover and remove the screws securing the keyboard to the PC, if any are visible.
Remove the keyboard.

Remove the screws securing the monitor to the hinges, and then set the monitor aside. Disconnect all visible cables connected to the motherboard; and then remove the screws from the top cover.

Remove the top cover to reveal the motherboard.
Locate and then remove the CMOS battery.

Leave it out of the notebook for 24 hours; then reinstall it and reassemble the Acer Aspire.

Other Options

If removing the CMOS battery fails to clear the password, or if you don't feel comfortable with the idea of opening your computer, you might be able to gain access to the computer using a backdoor password.

These special passwords were implemented to allow technicians to access locked computers. Not all models recognize backdoor passwords.

Most Acer Aspires use the Phoenix BIOS, and backdoor passwords for this BIOS include "BIOS," "CMOS," "phoenix" and "PHOENIX."

All of these passwords are case-sensitive.

May 04, 2014 | Acer Aspire Computers & Internet

1 Answer

How to remove the bios password and the windows password


Step 1:
The Acer Aspire stores the password in a component called the complementary metal-oxide semiconductor. This component is integrated into a random access memory chip embedded on the motherboard. The CMOS holds data that the basic input/output system - a critical software utility that controls how the computer operates at startup - accesses when the computer boots. If the BIOS detects that a password is registered in the CMOS, it will prevent the computer from booting until the user enters the password correctly. Depending on which model of Acer Aspire you own, you may be able to clear the CMOS manually. Contact Acer before attempting to clear the CMOS, as opening the computer without permission could void your warranty. Desktop Models Some Acer Aspire desktop models come with a jumper that is used to clear the password and other settings stored on the CMOS. This jumper is located on the motherboard and is often found next to a label such as "JBIOS1" or "CLR_CMOS." To clear the CMOS using the jumpers, turn off the computer, disconnect the power cable and remove the case cover. Remove the jumper shunt from pin 1 and pin 2; then place the shunt on pin 2 and pin 3. Return the shunt to its initial position after 10 to 15 seconds. If the Aspire doesn't come with a jumper to reset the CMOS, the CMOS can be reset by removing the lithium coin-cell battery instead. Removal is accomplished by pushing down on the tab securing the battery to the motherboard and lifting the battery out of its slot. Leave the battery out for 24 hours, and then return it to its original position with the positive sign facing up. Laptop Models b> Resetting the CMOS password on an Acer Aspire laptop is much more difficult than resetting the password on a desktop. Disassembly steps vary from model to model, but on most models, you'll have to take apart the computer to access the CMOS battery. Don't take apart the notebook if you don't have experience disassembling PCs. After turning off the computer and disconnecting the AC adapter, take out the battery (different from the CMOS battery). All visible screws must then be removed from the bottom of the notebook. Remove all components stored to their separate compartments on the base of the notebook. Turn over and open the PC. Lift up the switch cover and remove the screws securing the keyboard to the PC, if any are visible. Remove the keyboard. Remove the screws securing the monitor to the hinges, and then set the monitor aside. Disconnect all visible cables connected to the motherboard; and then remove the screws from the top cover. Remove the top cover to reveal the motherboard. Locate and then remove the CMOS battery. Leave it out of the notebook for 24 hours; then reinstall it and reassemble the Acer Aspire. Other Options b> If removing the CMOS battery fails to clear the password, or if you don't feel comfortable with the idea of opening your computer, you might be able to gain access to the computer using a backdoor password. These special passwords were implemented to allow technicians to access locked computers. Not all models recognize backdoor passwords. Most Acer Aspires use the Phoenix BIOS, and backdoor passwords for this BIOS include "BIOS," "CMOS," "phoenix" and "PHOENIX." All of these passwords are case-sensitive.

Mar 26, 2013 | Acer Aspire One AOD257-1497 Atom N570...

1 Answer

I am trying to change my CMOS battery in myAcer Extensa 4420. I am unable to locate it partly because I don't know where to look and because I don't know what it may look like. I think it is a...


hah im sorry to say this but it is a case of poor design to find the battery you must strip the computer down a bit the battery is located under the keyboard and palm rest on the mother board. the battery is flat and is in a round socket it shouldn't be hard to spot it once your there, here's an image of what it should look like http://blackman.amicofigo.com/gallery/index.php/Arduino/i2c-Items/rtc-battery .

Jul 18, 2011 | Acer CHARGER for Acer Extensa 4220, 4420,...

1 Answer

Falcon 4420 scanners needs cmos battery replaced on the pc board. What is the part number the battery and how easy is it to replace?


dont know for sure but these are usually 3032 button style batteries, you can buy them at a local supermaket.
pop out or slide out once youve got the case open.

NB this is a very general solution, open the case first if breaking the warranty doesnt worry you.

Mar 17, 2010 | Falcon 4420

1 Answer

How to find cmos battery in an acer laptop model 4220?


Below is the link to your service manual. The RTC battery of this particular acer is that flat battery inserted into a round socket on the motherboard. It is accessible only by removing the keyboard and palm rest.

http://tim.id.au/laptops/acer/aspire%204520%204220%204520g%204220g.pdf

Nov 12, 2009 | Acer 4220-2346 Notebook

1 Answer

I have an acer extensa 4420 and I need to bypass the admin password for the bios


Open it up and remote the CMOS battery on the motherboard for a minute or two.

Nov 02, 2009 | Acer Aspire 3680 Laptop

1 Answer

Where can i find CMOS battery of my laptop ACER travelmate


Hello,
You will have to turn it upside down and start removing compartments untill you find it. (As you did not give me the model of the computer I can't tell you exactly where it is)
The CMOS battery is located on the motherboard and it looks like a large watch battery.

Details on changing it is here: http://www.smartcomputing.com/editorial/article.asp?article=articles/2004/w1510/32w10/32w10.asp&articleid=24031

Have a great Day!

Jan 28, 2009 | Acer TravelMate 529ATX Notebook

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