Question about Panasonic Toughbook CF-51 Notebook

3 Answers

CF-51 no sound, drivers installed looks fine

Bought a toughbook from ebay with no software, i went to the panasonic driver site and dl all the drivers i could find in the 51 series. shows i have a sigma tel audio and device manager shows it worlking. There is no sound from the built in speakers, there also is no sound from the headphone jack.

my software is retail XP PRO service pack 3, i go to dxdiag to test and i get no sound. i have already checked the advanced volume controls and they are all fine. 

any help appreciated.

on a side note, there is one other device in the device manager that has a yellow exclamation on a yellow questions mark.

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  • Anonymous Feb 08, 2009

    I have tried installing drivers for the unknown device with no luck, the properties does not say what device it is and the driver is not found on the windows update.

    As for the sound, video and game controllers all are showing working as well but still no sound.

  • Iceman83041
    Iceman83041 Jan 05, 2014

    Install all 3 hotkey drivers in order 1. HK appendix 2. Hotkey Driver 3. Hotkey settings. they will install in a file called Util2, you have to search your C: drive for the file. run each file in the specified order then reboot. It should have sound after that. Note the last driver for these is SP2. It works though. Good luck

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If you go to the device manager and under the details of the unknown driver with the excalmation it says something about mat0019, it's most likely a problem that you don't have your hotkey drivers installed. On the CF-51, you have to have the hotkey drivers in order for the sub-functions of the F-Keys to work (the blue label like brightness, switch monitor output, and SOUND CONTROLS). Even if you have the appropriate sound driver, you will not have sound until you install the hotkey drivers as well. You can get them free from the panasonic busines toughbook support website. You'll have to register. There will be three hotkey related drivers. You HAVE TO INSTALL THEM IN ORDER. First do the hotkey appendix, then settings, then driver. Make sure to restart the machine as requested by the install program during the various installations.

Posted on Sep 21, 2009

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Can you please name the device that has the exclamatory mark next to it? Or you can also try right-clicking on the device and click on update driver. Then cchoose the option to search online for the appropriate driver. Windows will automatically locate and install the driver.

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Posted on Feb 08, 2009

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I have the same problem as stated above, the only difference is that, I have no exclmation on sound and audio when i check the device manager. I also installed via audio driver but i am still fail to have the sound. As i checked the sound from control panel everything where okay..Any help please.....Thank you and I appreciate your help..

Posted on Sep 13, 2010

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1 Answer

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May 30, 2012 | Panasonic Toughbook CF-51 Notebook

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Have you check Device Manager and under sound, video and game controllers to see if you have any yellow ? marks next to anything. You would go to start-control panel-system-hardware-device manager.
If you have any yellow marks missing then you will need to find the driver for those.
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http://pc-dl.panasonic.co.jp/cgi-bin/itn/toughbook/dl01.cgi

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Hello and thank you for using Fixya's services.

You can download the driver from the manufacturer's website. Go to site and search for your model number. The download is free of charge under support tab.

Please let me know if you have questions.

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Fn key does not work on Panasonic CF-19


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You can download the XP drivers from the panasonic site. CF-51 got many flavors and be sure that your model numbers are at hand when you retrieve the factory installed drivers.

Delete all SigmaTel drivers from the registry hardware section. This would help reinstall the correct driver. The presence of these wrong registry values prevent successful installation of the factory drivers.

I have installed se7en, vista and XP successfully. The sound is really problematic since Dell and Gateway laptops use similar sound chips and offers drivers on the net... but they don't work at all. The Gateway driver seems to install perfectly from device manager report, but only the mic works & no sound.

What I do is install the factory provided drivers in XP compatible mode and then use windows update to download the latest SigmaTel drivers (se7en pre-beta). Windows got a more compatible driver but it can only install over the original since the chips cannot be recognized.

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