troubleshooting Question

Toshiba c8556-s5196 keyboard suddenly doesn't work

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dovidfFlag for United States of America asked on
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A Toshiba c8556-s5196 running Windows 7 was working well and suddenly the keyboard doesn't work on the built in keyboard or an attached USB keyboard. It works minimally in that the user can type in the password to get in. It also works when f8 is pressed to get the machine into safe mode.

I tried running it without the battery and the problem still was there so it doesn't seem to be the battery ACPI setting.

It doesn't seem to be a hardware problem because the keyboard works very minimally and the USB keyboard also doesn't work. The synaptics pad works.

What could be the problem?
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dovidf
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