Try to go first to Safe Mode.
Bring up the "Start" menu. Select the "Shut Down" option and then click "Restart."
Wait for the Toshiba Satellite A105
laptop to begin its restart procedure. Press the "F8" key at regular intervals (every 3-4 seconds) when the Toshiba logo pops up on the screen.
Continue tapping the "F8" button until the advanced Windows options menu appears. Use the down arrow key to scroll through the list of advanced Windows options.
Highlight the option labeled "Safe Mode." Press the "Enter" key and wait for the
operating system to load in safe mode.
On Safe Mode try to use the keys that are not working if it's
woking it's a software problem and you need to have a System Restore for the laptop.
If it's still not working go to BIOS Settings of the laptop try to reset it to default settings.
Hit the "Power" button to turn on the computer. Press the F2 key on the keyboard. This must be done prior to the operating system loading; if the
Windows OS logo has popped up, it is too late. Boot into Windows, restart the computer, and try again.
Pressing F2 on a Toshiba laptop takes you directly into the BIOS, and any settings can now be changed.
If you have
successfully entered the BIOS Phoenix press F9 there will be an option that will pop out after pressing F9 the choose yes, after that press F10 there will be an option that says "Save and Quit." This will save any changes you've made, exit out of the BIOS, and restart the computer. Choose yes again, after that process the laptop will boot up now to your Windows Screen.
Try to use again the keys that are not working, if it's still not working definitely that's a hardware problem, you need to contact Toshiba Technical Support here's the phone number
800-247-7777
to assist you further with this problem or you can drop your laptop to a nearest Authorize Service Provider for Toshiba near in your place.
Hope this helps. :-)
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