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Can't Reset BIOS - Acer Aspire 9420 Laptop (EDIT: Solved)

  • 24-04-2010 1:42pm
    #1
    coillcam
    Registered Users, Registered Users 2 Posts: 1,727 ✭✭✭


    I have a friends laptop that I foolishly decided to work on. Anyway I need to reset the BIOS and have fully dismantled the laptop, unplugged the CMOS battery and still the BIOS is asking for a password upon re-assembly. I have tried various backdoor passwords also which won't work either.

    I can't seem to locate a jumper/switch to perform the reset.

    Can anybody shed some light on the matter?

    Solution: I left the cmos battery disconnected from the motherboard overnight and upon re-assembling it the next day the BIOS was reset succesfully


Comments

  • #2
    Webmonkey
    Registered Users, Registered Users 2 Posts: 9,579 ✭✭✭Webmonkey


    How long did you leave the CMOS battery unplugged for


  • #3
    coillcam
    Registered Users, Registered Users 2 Posts: 1,727 ✭✭✭coillcam


    Webmonkey wrote: »
    How long did you leave the CMOS battery unplugged for

    Approx 10 mins


  • #4
    patrickk
    Closed Accounts Posts: 240 ✭✭patrickk


    forget about it doesnt work on laptops removing cmos battery,password reset will have to be done by ringing acer


  • #5
    Antar Bolaeisk
    Registered Users, Registered Users 2 Posts: 3,091 ✭✭✭Antar Bolaeisk


    coillcam wrote: »
    Approx 10 mins

    Did you short out the CMOS battery connections using something like a non-magnetised head of a screwdriver while holding down the power button?

    Obviously make sure the battery is out and the power cord unplugged when you do this.


  • #6
    coillcam
    Registered Users, Registered Users 2 Posts: 1,727 ✭✭✭coillcam


    Antar Bolaeisk wrote: »
    Did you short out the CMOS battery connections using something like a non-magnetised head of a screwdriver while holding down the power button?

    Obviously make sure the battery is out and the power cord unplugged when you do this.

    Nope, did not try that.

    Actually I have reset the BIOS now. I re-assembled it just there now after leaving the cmos battery disconnected overnight and it did the trick. Time for a clean install.


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  • #7
    Webmonkey
    Registered Users, Registered Users 2 Posts: 9,579 ✭✭✭Webmonkey


    Good stuff


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