Question about Acer Aspire 5520-5156 Laptop

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Where is the cmos jumper to reset battery acer aspire 5520? already can see blue battery,have keyboard off

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  • Expert
  • 320 Answers

Hi here you've got link to service manual I hope it help

Posted on Aug 25, 2010

  • 6 more comments 
  • IT aid
    IT aid Aug 25, 2010

    http://www.nodevice.com/manual/newmans/a...

  • Ralph Sobek Jan 12, 2019

    This page does not exist! 404 error !!

  • Anonymous Jan 12, 2019

    ralph the post is near a decade old
    wow.

  • Anonymous Jan 13, 2019

    ralph 9 years late cant start his own post that it, with your facts not others probs.
    ralph post a photo of the failing screen so we dont need guess. ok, thanaks.
    assuming there is jumper is a big leap
    there is no such manual,
    acer treats them like consumer toys
    when broken , discard. like a tOASTER.

    the PC is 11+year old
    this is all there is, sorry,
    a users manual (lame)
    https://www.acer.com/ac/en/US/content/su...

  • Anonymous Jan 13, 2019

    ALL YOU CAN DO IS (lacking facts specific)
    REMOVE ALL BATTERIES,
    REMOVE POWER PACK.
    REMOVE LARGE BATTERY.
    CMOS RTC nvrAM COIN CELL,
    AND PUSH POWER BUTTON, 30SECONDS
    RELEASE BUTTON.
    AND WAIT 1HOUR. (all caps now discharged)

    THIS ERASES THE NVRAM (CMOS)
    THIS ONLY WORKS ON VERY OLD PC.
    OF THE 3 GENERATIONS.

    do not short the battery out.
    do not short PCB traces to say the intel
    ICH/CMP south bridge chip or it blows up.
    have proof. (from intel)

  • Anonymous Jan 13, 2019

    or ask acer.com
    ever heard of them ,they made it.
    hark?

  • Anonymous Jan 15, 2019

    https://www.youtube.com/results?search_q...


    acer if asked will ask you to prove you own it.
    new LAWs SPRING 2018 , A FACT.
    SO YOU ARE NOW HACKING, AND AS SUCH ONLY HACK SITES OFFER HELP
    Try hear and reading/watching all week long, ?
    https://www.youtube.com/results?search_q...


    the youtube pit. if doom.

  • Anonymous Jan 15, 2019

    https://www.youtube.com/results?search_q...

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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...

2 Answers

To reset my bios password


If you cannot access the machine after if has been powered up, it is still possible to get past the BIOS password. The BIOS password is stored in CMOS memory that is maintained while the PC is powered off by a small battery, which is attached to the motherboard.

If you remove this battery, all CMOS information (including the BIOS password) will be lost. You will need to re-enter the correct CMOS setup information to use the machine. The machines owner or user will most likely be alarmed when it is discovered that the BIOS password has been deleted.

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

Jan 23, 2011 | Acer Aspire 4315-2963 Notebook

1 Answer

My acer aspire 5542g keyboard is locked, how do i unlock it?


Try using Fn + F7. It turns the touchpad on and off.

Another solution is maybe CMOS or BIOS has locked the keyboard and touchpad and that maybe resetting the CMOS/BIOS by jumper or removing the battery will unlock them.

Nov 16, 2010 | Computers & Internet

1 Answer

Where is the battery in my acer aspire 5520 ? CMOS battery


CMOS battery will be inside placed on the PCB, to get into that you have dismantle the keyboard, backcover, DVD Drive, Battery. Only technical expert can do that, if carefully not handled then the H/w locks may break.

Sep 11, 2010 | Acer Aspire 5520-5908 Notebook

1 Answer

Where is cmos reset jumper? Is it near battery,


Try

http://support.acer.com/acerpanam/manuals/acer/0000/servicemanuals/S.G_Aspire_M5640_M3640M1640_BOOK_VerC.pdf


page 77

label CLR CMOS 3 pin type 1-2 clear 2-3 normal

May 16, 2010 | Acer Computers & Internet

3 Answers

Acer aspire 3100 series


If you where the CMOS battery is, there's beside it a jumper inserted in two of the 3 pins(left pin and middle pin). Remove the jumper from its original position and with it short the middle pin and right pin. This resets the CMOS ROM to its default settings minus the password. Return the jumper to its original position as before. Reboot the computer.

Apr 25, 2008 | Acer Aspire 3100-1405 Notebook

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