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  1. Join Date : Dec 2013
    Sydney, Nova Scotia, Canada
    Posts : 7,954
    Windows 10 IoT
       3 Days Ago #11

    That white 2 pin header is where the battery would be connected. There is a picture on the page in the link NavyLCD posted that shows the wires from the battery going to it. It appears somebody already removed it? If it has already been removed, the BIOS has reset to defaults on its own. Keep in mind, on a laptop, some settings will not be reset by removing the CMOS battery. If you set a BIOS password for instance that will not be erased by removing the battery. It's stored in non volatile RAM. Everything else will be erased though, boot order, etc will go back to defaults.
      My System SpecsSystem Spec


  2. Join Date : Jul 2015
    Posts : 6,344
    Windows 10 Pro
       3 Days Ago #12

    alphanumeric said: View Post
    That white 2 pin header is where the battery would be connected.
    Great catch! That explains the absence of a battery - it's supposed to be there but isn't.
      My System SpecsSystem Spec


  3. Join Date : Aug 2016
    Posts : 36
    Windows 10 Pro 32-bit
       3 Days Ago #13

    alphanumeric said: View Post
    That white 2 pin header is where the battery would be connected. There is a picture on the page in the link NavyLCD posted that shows the wires from the battery going to it. It appears somebody already removed it? If it has already been removed, the BIOS has reset to defaults on its own. Keep in mind, on a laptop, some settings will not be reset by removing the CMOS battery. If you set a BIOS password for instance that will not be erased by removing the battery. It's stored in non volatile RAM. Everything else will be erased though, boot order, etc will go back to defaults.
    So, I just have to buy a new battery?
      My System SpecsSystem Spec


  4. Join Date : Dec 2013
    Sydney, Nova Scotia, Canada
    Posts : 7,954
    Windows 10 IoT
       3 Days Ago #14

    NavyLCDR said: View Post
    Great catch! That explains the absence of a battery - it's supposed to be there but isn't.
    I had to zoom in on one of the pictures in the link you posted to see it. Plus it was upside down compared to the picture the OP posted.
      My System SpecsSystem Spec


  5. Join Date : Dec 2013
    Sydney, Nova Scotia, Canada
    Posts : 7,954
    Windows 10 IoT
       3 Days Ago #15

    BicycleRow said: View Post
    So, I just have to buy a new battery?
    Yes and no? A missing CMOS battery won't prevent a PC from booting up, or cause the no display issue you posted. Not as far as I know. So you have other issues to sort out.
      My System SpecsSystem Spec


  6. Join Date : Oct 2016
    Posts : 27
    Windows 10 Pro Build 1607
       3 Days Ago #16

    Sorry, i thought we may have gotten lucky. Hadn't seen a battery hidden before. If it doesn't have a battery then it must be using a capacitor to store a charge and then trickle that into bios. Shorting capacitors would be a real pain.

    I assume you want to keep using this laptop so like someone else suggested it maybe quicker and easier to get a replacement keyboard with a working function key.

    Now on some keyboards you dont have to press the fn to get f2. Likely you've already tried this as well.
      My System SpecsSystem Spec


  7. Join Date : Dec 2013
    Sydney, Nova Scotia, Canada
    Posts : 7,954
    Windows 10 IoT
       3 Days Ago #17

    BicycleRow have you tried booting it up with an external monitor connected? Also, is this maybe the result of a failed BIOS flash?
      My System SpecsSystem Spec


  8. Join Date : Oct 2016
    Posts : 27
    Windows 10 Pro Build 1607
       3 Days Ago #18

    I know I'm reaching but ......

    Where is this 2 pin connector you are shorting. Is it possible that this is where a battery would connect if one was present? . See this pic.

    Click image for larger version. 

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    I provided picture just to see where the battery connects. Just trying.

    These pictures are from a 5745G as per opening comments of author at this link http://www.insidemylaptop.com/disass...e-5745-laptop/
      My System SpecsSystem Spec


  9. Join Date : Dec 2013
    Sydney, Nova Scotia, Canada
    Posts : 7,954
    Windows 10 IoT
       3 Days Ago #19

    Caledon Ken said: View Post
    Sorry, i thought we may have gotten lucky. Hadn't seen a battery hidden before. If it doesn't have a battery then it must be using a capacitor to store a charge and then trickle that into bios. Shorting capacitors would be a real pain.

    I assume you want to keep using this laptop so like someone else suggested it maybe quicker and easier to get a replacement keyboard with a working function key.

    Now on some keyboards you dont have to press the fn to get f2. Likely you've already tried this as well.
    On a laptop, the BIOS could retain its settings if powered from the main battery, even if the CMOS battery was dead or removed. All would be fine until you unplugged the power pack and removed the main battery. The after a few minutes the settings would be lost. Date and time would be wrong and the BIOS would go back to all default settings. On a desktop PC, that doesn't have any other battery, all would be lost every time you shut down if the CMOS battery was dead or missing.
      My System SpecsSystem Spec


  10. Join Date : Aug 2016
    Posts : 36
    Windows 10 Pro 32-bit
       3 Days Ago #20

    alphanumeric said: View Post
    BicycleRow have you tried booting it up with an external monitor connected? Also, is this maybe the result of a failed BIOS flash?
    Yeah, I've tried. And no. My friend just switched from his onboard video to his video card in the BIOS settings and that caused it.
      My System SpecsSystem Spec


 
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