Qosmio G40 - 10F down arrow is triggered by itself

Qosmio G40 - 10th down arrow seems to trigger by itself while booting and while I view web pages.

The problem surface when I was accessing the web pages at the start of the screen to scroll down by himself.
Before, I thought that the button may be pressed hard but when I looked at the issue through a senser key application to test what triggers the down arrow key press on and found that two or three other keys trigger arrow key down automatically.
namely, in arrow, i key, key k, function keys.

But when I press ESC or Page up/Page down, scrolling stops for a while but starts to make arrow down by itself again.

I have re-installed and restored the entire operating system to the date of loading of the factory and the problem solved only for a few minutes and the issue is back.

I am convinced that this is due to software problem and not a hardware problem, as the key works fine for a while and after a few minutes, begins to trigger arrow down permanently.

Please advise,
Thank you.

Have you tried an external USB keyboard and then you have the same problem?

I think that it s a hardware problem and the keyboard must be exchanged, but that before test with an external keyboard.

Tags: Toshiba

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