Panasonic toughbook cf-28 codec problem

Press "F2" on your keyboard when you see the Panasonic logo appear on the screen. You will immediately be prompted to enter your Panasonic Toughbook Cf-29 BIOS password. Type the word "Biostar" into the password prompt. This is your Panasonic Toughbook Cf-29 backdoor BIOS password. Press the "Enter" key to unlock your Panasonic Toughbook Cf-29 BIOS.

All drivers for either the Toughbook 28 or the Toughbook 51
can be found on the following Panasonic Official Website:


Official Support Download Center of the Drivers Manuals and FAQs TOUGHBOOK...


Good Luck to you and Regards from:
Richard, Montreal Based Panasonic Canada Toughbook
Authorized Dealer since 1989.

Some bios menu allows you to boot from USB. (Some are locked this option by makers.)

Run safety mode and try again to see whether your DVD rom is working.

Best way will be go to device manager; go to properties of DVD rom; go to driver and click roll back driver.

If this is not working (in case), uninstall driver and reinstall it.

As long as it is a plug&play drive it should work just fine. It's hard to install a USB CD/DVD Drive that isn't plug&play.

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.
It may be a codec that you need too.
Also Start/ control panel/ Sounds check that MUTE is not selected and that volume is UP.
Could be these drivers that you need Audio Output: Sound card Audio Codec: STAC9751 Compliant Standards: AC '97.
Check this site and make sure you have the complete model number, There are several different ones for your Cf51 that should look like this CF-51xxxxA/H/Qxx (mk1) . Some model numbers require that you have Sevice Pack 2 or SP2 for windows installed for the sound driver to work.
http://pc-dl.panasonic.co.jp/cgi-bin/itn/toughbook/dl01.cgi

On all Panasonic Toughbooks, any model pre-2008/2009 would have the older LCD screen with an "inverter". The new screens are called LED because there is no inverter.
The inverter is like the "ballast" on a fluorescent tube lighting fixture. The tube could be good but if the ballast is blown then the tube will not "light-up". This is also true of the inverter.
You can also tell when the inverter is about to burn-out when you first start your toughbook in the morning and the screen is initially "red" and then turns white after the unit warms-up for a few minutes.
Good Luck to you.
Regards from Richard, Montreal Based Panasonic Canada Authorized Toughbook Dealer since 1989.

panasonic support website
internet shopping sites
shopping.google.com

www.freecodecs.com
the above link will take you to the required site, choose the codecs package for your operating system(xp codec pack or vista codec pack), download, run and away you go.
For future referance, to update the packs, uninstall the old one before installing the new.

it means that the battery is bad
replace battery

you may need the latest codec pack, here is the web address:

http://www.xpcodecpack.com/download

hope this solves your problem