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Beginner
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CMOS Checksum error

I have dh55pj board and recently updated BIOS.In BIOS setup,I have loaded defaults value by pressing F9, then changed time and date and pressed F10 to save and exit.But still appears "cmos checksum error","cmos time not set".Please help me....

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Super User
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Download TC0048P.BIO file : https://downloadcenter.intel.com/download/20725/BIOS-Update-TCIBX10H-86A-?product=48955 Download BIOS Update [TCIBX10H.86A] and update your bios using bios recovery method (with configuration jumper removed). Refer to read.me file to instruction how to recover bios or to the following instructions:https://www.intel.com/content/www/us/en/support/boards-and-kits/000005630.html?wapkw=bios+recovery Recovery BIOS Update Instructions for Intel® Desktop Boards

In addition refer also to table 26 in your board specification: https://www.intel.com/content/dam/support/us/en/documents/boardsandkits/desktop-boards/H55_P55/DH55P... https://www.intel.com/content/dam/support/us/en/documents/boardsandkits/desktop-boards/H55_P55/DH55P...

Note that the bios may be reset to its defaults by pressing on F9 only in Configure mode (i.e. the configuration jumper between pins 2-3) instead on Normal position (between pins 1-2).

Hope this helps

Leon

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Super User Retired Employee
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If, after following Leon's advice, the BIOS continues to display the CMOS Checksum Error message, it means that you need to replace the CR2032 battery on the motherboard.

...S

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Beginner
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Thanks Leon and Scott for your efforts.I have changed battery two times,but still shows checksum error message.I think setting up windows may help to solve this problem .

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Super User
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Hello Rakib

You did mention that two times you have replaced the CMOS battery. Still I want clarify:

1. Did you also performed bios recovery as I've suggested in my post above?

2. While you have pressed on F9 to set bios defaults, was the configuration jumper installed between pins 2-3?

And finally in my opinion, Resetting or reinstalling Windows, will not fix CMOS checksum error. This error is generated by the bios firmware rather than Operating System. If bios recovery and/or resetting bios to default setting doesn't fix this problem, try to rollback to the previous bios version which worked good (do this using bios recovery method).

Leon

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Beginner
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I updated BIOS using BIOS recovery method without removing configuration jumper,but when I removed jumper nothing display on monitor.Can you please tell me the process step by step.

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Super User
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T/he bios recovery process is described step by step under this link:https://www.intel.com/content/www/us/en/support/boards-and-kits/000005630.html?wapkw=bios+recovery Recovery BIOS Update Instructions for Intel® Desktop Boards . While you enter to this page press on Recovery with USB device and you will see the step by step instructions. The USB device shall be formatted to FAT32. Download TC0048P.BIO file : https://downloadcenter.intel.com/download/20725/BIOS-Update-TCIBX10H-86A-%3Fproduct%3D48955 Download BIOS Update [TCIBX10H.86A]

Leon

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Beginner
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I followed those steps,but step 5 says to remove configuration jumper and after removing jumper when I start the computer ,it doesn't display anything on monitor.So how do I complete next steps to update BIOS without seeing monitor.

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Super User
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1. When you powering up you computer with the jumper installed, do you see any video output? Intel logo?

2. If you don't see any video, can you connect other monitor? or other video cable?

Leon

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Beginner
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1.When I remove the jumper and starting up the pc,there is power on cpu,but display nothing on monitor.

2.But when I put back the jumper and start the pc , everything is normal.

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Super User
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That means that your video is OK, but for some reason the recovery process is not starting. Could be that your USB is not correctly formatted to FAT32. Such situation happen if it was used for some Linux project before. Try to work with other USB or correct formatting using SD Formatter tool: https://www.sdcard.org/downloads/formatter_4/eula_windows/ SD Memory Card Formatter for Windows Download - SD Association . Download this tool, install and format using this tool your USB to FAT32. Now copy valid .bio file and try again. Wait few minutes to process completion.

Leon

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Beginner
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Finally it is done...Thanks Leon for your time and efforts.I really appreciate your help.My USB device was in NTFS format ,that caused the problem.It causes me trouble for nearly two months.I learned many things from this trouble and thanks to you.

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Beginner
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lw1948 Hello

After I have done recovery process successfully ,the same problem rise again still gives the checksum error message.What should I do??

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Super User
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The checksum error happened again without any changes in bios? Any way, try to reset reset bios:

1. Power down your PC and disconnect the power cable.

2. Place Configuration jumper between pins 2-3.

3. Reconnect the power cable and power On you PC. After POST, setup will run automatically and Maintenance menu will be displayed.

4. Press F9 followed by "Y" to reset bios settings. Press f10, followed by "y" to save the settings and exit.

5. Power down the computer, disconnect the power cable and replace configuration jumper between pins 1-2 (normal position).

Leon

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