Tecra A4: F10 buttons flash on, then keypad doesn't work

Dear Toshiba support,
After often travelling with my laptop a Toshiba Tecra A4, the F10 button flashes, some keys dont work and a pop-up window says you are holding down the CTRL key when I am not.
Im not sure if the keypad needs replacing or the motherboard.
It is a wonderful workhorse laptop, so would prefer to repair, though not sure if it is a keypad or mother board repair.
Has anyone experienced similar and can suggest a remedy?
All advice and suggestions very much appreciated.
Cheers,
Colin.

Hi
Did you try to press CTRL key once again to check if you can disable this?
To be honest its not easy to say what could affect the keyboard functionality but it could be possible that the keyboard starts to malfunctions
In such case it would be enough to replace the keyboard.
But the point is that this is only an assumption.
Maybe its better to check the old keyboard firstly (this is a job for technician) before purchasing a new one.

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