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Hp business pc/912: error while booting/ reset case disabled

Once the cabinet of the Hp pc was opened to fix the nvidia card, as it was completed the cabinet was closed and the pc was restarted. after booting there is a error page which shows like this 912: ''the case was opened since last time''
everytime i have to get into BIOS setup by pressing F10, click hardware monitor set, enable the reset case settings and press F10 to save and then only the pc is working. i have installed the xp os and it is working fine. only error is everytime while switching on the pc, it is showing the error and again i have to go to set up and enable the case options.
please give me a proper command to solve this problem.

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Go into the BIOS and disable the error message. You will need to look around in the BIOS to find the exact location of the enable/disable setting for case intrusion.

Posted on May 22, 2009

  • click_afthaf Apr 11, 2011

    I was attended the problem and solving by using BIOS and enter to hardware monitor then disable cpu case open, then the beep sound was disabled, now my HP machine is working properly.. M.A.Mohamed Afthaf.


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Start yr machine and do this__
F10 (for enter in BIOS)------hardware monitor-----Reset cade open status__
and disable this option. and now press
F10----- Enter.

Posted on Feb 25, 2014


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This error code happens when the cover of the computer case has been removed, usually an HP computer. While the BIOS can be different between different models, this should help.
Turn the computer on
• Press F10 to enter the BIOS setup, wait for about 10 seconds
• Find the Hardware Monitor Setup menu (use arrow keys), select then press enter
• On Reset Case Open Status, change value from Disable to Enable (use + on the numeric pad on the right side of the keyboard to change the value)
• Press F10 to save the configuration, press Enter.

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Make sure you close the case cover first before performing the steps below

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