Strange keyboard on Satellite M40 problems

My Toshiba M40 has been giving me problems keyboard quite frequently. I funny characters like NB¬A
When I press the left SHIFT key and then the keyboard starts abnormal behavior:

1. He moved to uppercase mode - to type letters more low, I actually have to use the caps lock.
2. I can't use the SHIFT key to type the special characters figures.
3. by clicking on the menu bar gives me a different effect, as if the SHIFT key is down already as it is not.
4. press the button right shift takes me to the "Save" option
5. I can't select a file or folder as several of them selected at the same time.

And then let fall, shut down the computer (it does not restart at this time)
After a while, the computer starts normally, but I'm never sure when it will start to behave badly again.
Read about the update of the bios, so I got mine upgraded to version 1.7 of the toshiba Web site (this is the most recent they had for machines with ATI graphics card).
Sometimes, I use an external keyboard when the problem occurs repeatedly.

would appreciate advice on how to overcome this software / hardware problem.

Hey Ashok,

It is not easy to say what is causing this strange behavior, especially since it also occurs with an external keyboard. One clue is that the laptop does not restart once you stop it unless leave you for a short period. This suggests that the unit is overheating and that it may well have an impact on the unit that is causing your problems.

I suggest that you try to give the laptop a clean to remove any accumulation of dust and debris from radiator CPU.

Kind regards

Tags: Toshiba

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