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    Any Computer Whizzes on here? Got a problem needing help.

    I know my way around a PC as well as the next person but have never came across this.

    I'm using a motherboard by ASUS and verytime i switch my PC on it comes up with this on the BIOS screen i think.

    Big old fashioned blue screen in an old setup - Thats the best way of describing it:

    Phoneix Award BIOS CMOS (Thats the heading of the box)

    Popup saying:

    The system intruded, chassis opened or tempered before, please check the system.

    I exit without saving then get the screen saying:

    CMOS checksum error: Defaults loaded so press F1 to get to my desktop screen.


    I have not opened the PC up for about 6 months and suddenly have this message, is there any way of getting rid of it or would it be easier to take to a PC shop?

    Thanks to any replies, rep will be handed out accordingly.

    12 Comments

    maybe you should think about giving your pc a spring clean, just hoover all the dust out of the vents and fans.
    you will be quite suprised how much dirt will be in there.

    Has the machine been moved for hoovering or something? Sounds like a stick of RAM has become unseated or something. Try opening her up and removing all the RAM, and then putting it back in - might solve your problem.

    In BIOS return settings to default ...hit f12 to save changes and exit ...I have a system with an old ASUS mobo that came up with BIOS Checksum error once...did that...problem solved.

    Type that message into Google.
    Answer found in about a minute.

    If the above does not work as i have realised in the past you might need to re flash your pc bios. Think you can do thi in windows. Just get the updates from asus website.

    But most of the tim the above mentined does work.

    The checksum error is because your CMOS battery has ran out (The little flat battery on the motherboard). Buy one for a pound and fire it in, that'll fix the problem.

    I had that problem for months until I worked it out. You can run the machine but the clock is always wrong when you turn it on - As the settings aren't stored in the BIOS as the battery is dead lol. Cheap and easy fix, love me.

    Ignore the other replies, just read this one :P

    Don't take it for repair - This is a £2, 2 minute job - A shop would easily sting you £50 for this.

    you could clean it out when you change the battery.

    wickedteen;4672851

    you could clean it out when you change the battery.



    Yeah sure, give it a clean for good measure, but it's definitely the BIOS battery :P

    DragonChris;4672798

    The checksum error is because your BIOs battery has ran out (The little … The checksum error is because your BIOs battery has ran out (The little flat battery on the motherboard). Buy one for a pound and fire it in, that'll fix the problem.I had that problem for months until I worked it out. You can run the machine but the clock is always wrong when you turn it on - As the settings aren't stored in the BIOS as the battery is dead lol. Cheap and easy fix, love me.Ignore the other replies, just read this one :PDon't take it for repair - This is a £2, 2 minute job - A shop would easily sting you £50 for this.



    +1 - Cant believe some of the other replies on here.

    as above - change the battery

    Original Poster

    Hey thanks to everyone for the replies. And somein depth ones that i will carry out tomorrow when i get chance.

    Have repped accordingly. Thanks again.

    DragonChris thanks for the detailed post and info.

    Seems there are more bright sparks on here than i first thought, was expecting this to be a 'no reply thread' lol.

    stevey_p7;4673274

    Hey thanks to everyone for the replies. And somein depth ones that i … Hey thanks to everyone for the replies. And somein depth ones that i will carry out tomorrow when i get chance. Have repped accordingly. Thanks again.DragonChris thanks for the detailed post and info. Seems there are more bright sparks on here than i first thought, was expecting this to be a 'no reply thread' lol.



    Lol.

    Believe me, all you need is a replacement CMOS battery (I kept saying BIOS battery, duh me). Just make a note of the type of battery you need (It's printed on the battery itself). Easy job. You won't need to do anything else after replacing the battery :P

    You're welcome by the way I expect my cheque is in the post? :P
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