Windows 8 and 8.1 Forums


Clock changes every 10 minutes?

  1. #11


    Thanks for your answers, fellow members.

    Somewhat familiar with BIOS tech, but I find I'm always learning more on any subject.

    Somewhat familiar with these terms, but in reading up I see CMOS has been around since the early 60's and EEPROM since the late 70's so I'll assume my friend didn't lose all the BIOS file, just manual setting changes. Not that there was a whole lot of changes one could make back then. BIOS flash files have become rather sophisticated nowadays, especially since the introduction of UEFI.

    I thought too that these batteries lasted for years, but I guess in some instances they don't. Perhaps just bad apples out of the barrel from manufacturing? More like a lemon? Another thing that came to mind is battery bad battery contacts. Probably highly unlikely, but then there's Murphy's law.

    Anywho, hopefully all went well with the OP's "first freelancer job". Perhaps he or she will post back with the results.

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  2. #12


    Well, you can still loose the BIOS settings the "old way" and yes the contacts on battery can get loose or coroded too, seen some of that too.
    Wandering which kind of freelance job OP's got, hope it's not with computers.
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  3. #13


    My bet it is not the battery as it is not in use when the computer is on, you can take the battery out and change it when the computer is on and not lose the settings the clock part is only read at boot time.
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  4. #14


    Funny thing happened to me too. Used a Linux Mint to boot may computer from USB, there time zone was not set for my country but for some USA time zone and every time I booted from it, it changed my clock in BIOS so when I got back to my windows it kept updating time thru internet. Took me few times to catch what was happening and change time zone on Linux distro.
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  5. #15


    San Jose - California
    Posts : 2,847
    8.1x64PWMC Ubuntu14.04x64 MintMate17x64


    My bet it is not the battery as it is not in use when the computer is on, you can take the battery out and change it when the computer is on and not lose the settings the clock part is only read at boot time.
    I am sorry but this is a very bad advice. Never, ever replace anything in your PC while it is running, you can fry the MB by touching or accidentally dropping the battery on the MB.

    Most people think BIOS/CMOS are the same thing and they are not. Let me elaborate a little bit more on BIOS/CMOS business:

    There are 2 separate chips on your MB. One is the BIOS (EPROM=Erasable Programmable Read Only Memory) and the other is CMOS (RAM=Random Access Memory).
    1. BIOS(Basic Input/Output System): contains a special program that helps the CPU interact and control the other components such as video cards, sound cards, network cards, USB ports, hard drives etc... and can only be updated via the BIOS update utility. BIOS chip does not require any power once it has been programmed into the EPROM.
    2. CMOS(Complementary Metal-Oxide-Semiconductor): lets you change the time and date and settings for how devices are loaded at start up and are read by the BIOS at boot up.
      Since it is a RAM chip, CMOS battery on the motherboard supplies constant power to that CMOS chip. If the battery is removed or Dead, the CMOS would lose the information stored in it including the time and date. Any settings you made in the CMOS setup would be lost, and you would need to make those settings changes again by entering the BIOS (using DEL or whatever the function Keys assigned by your MB manufacturer).


    I am always hungry for speed, so I overclock all my PC's and often I have to get into BIOS and make modifications in the CMOS.
    Last edited by topgundcp; 21 Sep 2013 at 04:37.
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  6. #16


    I did the job. I set the timer correct. I changed and checked the time via Windows GUI, CMD, BIOS; they all seemed consistent (even after shutting down the computer) after I reset the timer. The client told me he already changed it in Windows, and that it will revert back after a certain length of time (10 minutes to 30 minutes) but it didn't seem to happen with me and I was there a good 30 minutes after correcting the time.

    One more detail; he's using a HP Pavilion G6 notebook PC. If the clock reverts back to an incorrect time again then I may try replacing the CMOS battery.
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  7. #17


    San Jose - California
    Posts : 2,847
    8.1x64PWMC Ubuntu14.04x64 MintMate17x64


    One more detail; he's using a HP Pavilion G6 notebook PC. If the clock reverts back to an incorrect time again then I may try replacing the CMOS battery.
    http://h10032.www1.hp.com/ctg/Manual/c00530488.pdf

    Look in the section on how to replace CMOS battery (Also known as RTC(Real Time Clock) Battery)
    Last edited by topgundcp; 20 Sep 2013 at 20:11.
      My System SpecsSystem Spec

  8. #18


    Quote Originally Posted by topgundcp View Post
    My bet it is not the battery as it is not in use when the computer is on, you can take the battery out and change it when the computer is on and not lose the settings the clock part is only read at boot time.
    I am sorry but this is a very bad advice. Never, ever replace anything in your PC while it is running, you can fry the MB by touching or accidentally dropping the battery on the MB.

    Most people think BIOS/CMOS are the same thing and they are not. Let me elaborate a little bit more on BIOS/CMOS business:

    There are 2 separate chips on your MB. One is the BIOS (EPROM=Erasable Programmable Read Only Memory) and the other is CMOS (RAM=Random Access Memory).
    1. BIOS(Basic Input/Output System): contains a special program that helps the CPU interact and control the other components such as video cards, sound cards, network cards, USB ports, hard drives etc... and can only be updated via the BIOS update utility. BIOS chip does not require any power once it has been programmed into the EPROM.
    2. CMOS(Complementary Metal-Oxide-Semiconductor): lets you change the time and date and settings for how devices are loaded at start up and are read by the BIOS at boot up.
      Since it is a RAM chip, CMOS battery on the motherboard supplies constant power to that CMOS chip. If the battery is removed or Dead, the CMOS would lose the information stored in it including the time and date. Any settings you made in the CMOS setup would be lost, and you would need to make those settings changes again by entering the BIOS (using DEL or whatever the function Keys assigned by your MB manufacturer).


    I am always hungry for speed, so I overclock all my PC's and often I have to get into BIOS and make modifications in the CMOS.
    If I may ad just one more thing, Never do any work on the MB, like changing batteries, ad on cards, memory etc, or reset BIOS while the power is connected to PSU or it's switch is ON. There's always some paths in MB that are under power. Most MBs have some kind of warning light just because of that.
    I too fiddle with BIOS a lot, so I just installed a momentary switch on BIOS reset contacts so I can reset it without sticking my fingers in the case. I find it really handy for experimenting.
      My System SpecsSystem Spec

  9. #19


    San Jose - California
    Posts : 2,847
    8.1x64PWMC Ubuntu14.04x64 MintMate17x64


    If I may ad just one more thing, Never do any work on the MB, like changing batteries, ad on cards, memory etc, or reset BIOS while the power is connected to PSU or it's switch is ON. There's always some paths in MB that are under power. Most MBs have some kind of warning light just because of that.
    @CountMike
    Good additional Info. However, with the power cord unplugged and the PSU switch off, the status/warning lights on the MB are still on, that means there's still some power on the MB. To discharge completely from the MB, you also need to press and hold the power button until all lights are out.
      My System SpecsSystem Spec

  10. #20


    Quote Originally Posted by topgundcp View Post
    If I may ad just one more thing, Never do any work on the MB, like changing batteries, ad on cards, memory etc, or reset BIOS while the power is connected to PSU or it's switch is ON. There's always some paths in MB that are under power. Most MBs have some kind of warning light just because of that.
    @CountMike
    Good additional Info. However, with the power cord unplugged and the PSU switch off, the status/warning lights on the MB are still on, that means there's still some power on the MB. To discharge completely from the MB, you also need to press and hold the power button until all lights are out.
    Yeah that's a good precaution too but depending on PSU and it's capacitors it will bleed in few seconds but I do it anyway.
      My System SpecsSystem Spec

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Clock changes every 10 minutes?
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