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	Replies: 2 - Pages: 1 - Last Post: 07-Aug-2012 23:42 Last Post By: joetest	Threads: [ Previous \| Next ]

joetest

Posts: 2
Registered: 03/08/12

Sudden Keyboard Failure (NB550D)
Posted: 03-Aug-2012 01:09

Hi Guys

I'm puzzled and hope someone can help.

Our NB550D mini notebook internal keyboard suddenly stopped working.
We have not changed any settings or undertaken any driver updates, no viruses found, no drops or spills.

No keys function - including the caps lock LED.
I have tried rebooting and accessing the BIOS with F2 or F12 but keyboard does not respond.

Fortunately the trackpad and mouse buttons work so I've gone into Device Manager (Windows 7) and it states that the device is working properly.
It lists the driver as 'standard PS/2 keyboard'.
I did a driver update and it came back to say that the best driver is already installed.

I then went to DirectX Diagnostics and states keyboard status as attached and no problems found.

I looked at various forums which advised things like taking battery out and holding the power button for 10s and then rebooting - none of it worked.

Finally I resorted to the virtual keyboard which interestingly when I select the virtual caps lock key the LED comes on.

I don't have a spare keyboard so haven't tried using a usb keyboard but even if that works it's the internal keyboard we want to use.

If it is a SW issue wouldn't the driver and device manager inform us of the error?
And if it is a HW problem why does the LED light via the virtual keyboard as well as saying it is connected in DirectX Diagnostics.

It just went out of warranty 2 months ago so any suggestions would be greatly appreciated.

Thank you

PauPau

Posts: 4,280
Registered: 21/09/09

Re: Sudden Keyboard Failure (NB550D)
Posted: 03-Aug-2012 09:44

in response to: joetest

Hi

The notebook uses the common standard Microsoft keyboard driver therefore I don’t think its software problem
If external USB keyboard would functions, then this would mean that the controller is OK and in most cases the internal keyboard needs to be replaced…

Compatible keyboard can be ordered from local Toshiba ASP.

joetest

Posts: 2
Registered: 03/08/12

Re: Sudden Keyboard Failure (NB550D)
Posted: 07-Aug-2012 23:42

in response to: joetest

Thanks PauPau

I borrowed a usb keyboard and the usb keyboard works.

What was strange as soon as I started using the usb keyboard, the built in Toshiba keyboard started partially working.

With the usb keyboard plugged in the space bar, cursor keys and some alpha keys worked again on the internal keyboard. However when I pressed certain keys (like s or d etc) the internal keyboard would freeze up and no keys would work including space bar etc.

When I rebooted I still could not access bios unless I plugged in the usb keyboard.

It is weird how it started responding with an external keyboard, would you think that a complete reinstall of windows would be of any use? Or is it likely to be hardware related? If it is hardware it is just strange that the keys work depending on what else is plugged in.

Thanks again

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