Laptop Look Dead? Try to Change the BIOS Battery




A friend gave me an laptop that the motherboard was dead.
This friend contacted HP,they wanted 400$ for reparation
Just repair it in 5 minutes

Teacher Notes

Teachers! Did you use this instructable in your classroom?
Add a Teacher Note to share how you incorporated it into your lesson.

Step 1: Tools Needed

- One philips screwdriver
- One dead computer
- VERY IMPORTANT: One 2032 3V battery
- Optional: Multimeter

Step 2: Find the RAM Compartiment

Find where the RAM are situated,
In my case,the Broadcoam Wireless card was there

Then,open the compartiment with the screwdriver

Step 3: Unscrew the Wireless Card

Unscrew the wireless card.
It must have a 3V battery.

Step 4: Change the Battery

Change the battery:
Just change the old one with a new one

Step 5: Put Everything Back

Put everything back:
Screw all the screws

Step 6: Reset the Bios

In the bios,just reset all the settings and change the date and hour


Normally,you must have a new functionnally computer

Be the First to Share


    • Instrument Contest

      Instrument Contest
    • Make it Glow Contest

      Make it Glow Contest
    • STEM Contest

      STEM Contest

    32 Discussions


    5 years ago on Introduction

    Hi, All...

    I have HP DV6 1111au laptop .. with 2gb memory n 320gb HDD..
    Just few days back.. it started to boot on very slowly thought its working very smoothly..
    I ran all the tests on HDD n memory, change the RAM, HDD.. but still the problem persists..
    I read a lot around about the booting process being slow but could not find any appropriate solution fot this slow boot..
    The booting options also load really slow, sometimes boot time is 5 min. on main HP logo screen sometimes its .. 10-25mins.. n sometimes it cannot get started.. then I have to manually restart it.. but when if its ON when restart command being given.. it boots up rilly fast..

    I have hard reset over the laptop.. changing BIOS settings.. i.e loading the default one.. also tried to update the BIOS, which is F.18 version.. no new update ...

    Please help me.. all people and experts out here.. rilly .. need help...


    10 years ago on Introduction

    Good and simple, i suggest changing your title to 'swapping out a motherboard battery', or something along those lines. It would seem that the laptop is running mac os x?

    12 replies
    Joe Martingmjhowe

    Reply 10 years ago on Introduction

    No, thats xp! I highly doubt that the CMOS battery would stop the computer from booting. The CMOS battery powers the internal clock of the computer and that alone would not cause a complete breakdown, Maybe some errors due to the time being incorrect but NOT broken.

    JakeSullyJoe Martin

    Reply 5 years ago on Introduction

    No thats wrong, CMOS battery runs both clock and bios so when cmos battery dies the bios will be dead to so yeah you have no skills ;), secondly last pic is of mac os x not windows XP


    Reply 5 years ago on Introduction

    It was a compatible laptop for Hackintosh, it ran iAtkos for few years before my nephew broke the screen...


    Reply 7 years ago on Introduction

    I ran into this just a week ago with an older Toshiba laptop. Stone dead. No access to the CMOS battery without completely removing the MB from the case. Poor design, or planned obsolescence?


    I was just going to say it is one of the troubleshooting questions on the A+ computer certification exam. The CMOS is required or the computer cannot boot, the battery does not just power the clock, however, without a clock the computer cannot run either.  The start up settings are stored in EPROM, which is maintained by that same battery. The computer needs those setting to boot also.


    . I've only run into one computer that wouldn't boot with a dead battery and that was ~15 years ago; but I don't see many computers with dead batteries. I think that happens when the HDD params get erased or scrambled (I could boot the computer if I set the drive params after the POST). Most, if not all, recent BIOSes will auto-detect the drive params, so it's not usually a problem nowadays.


    Reply 10 years ago on Introduction

    Yeah maybe But I repair also one other computher that don't wanted to boot It worked good too

    gmjhoweJoe Martin

    Reply 10 years ago on Introduction

    ah yes, i thort it was a hackintosh, but on closer inspection i see the windows quick launch.


    Reply 9 years ago on Introduction

    Now, I installed Mac OS X Leopard on this laptop, it is so faster than XP, boot in 30 seconds and shut down in 5-6 seconds


    8 years ago on Introduction

    I have an old HP xh485 and there is no sign of a CMOS battery, even after opening the top and removing HD and KYBD. Help me find that little guy!

    2 replies

    9 years ago on Introduction

    will a general CR2032 work? or does it have to be specific? they are both 3 volts...