Keyboard problem - SHIFT key always on

The keyboard functions as if the SHIFT key is always on.

For instance impossible to type numbers, only the upper keys ! @ # $ % ....

Also, other keys give the wrong input. But an external keyboard works just fine.

Is there any way to fix the keyboard or to replace it?

Thanks for the help.

thanks a lot for your help.

This is not my computer, but I dont think there was anything spilled in it.

the problem for instance is that it starts only on safe mode, as the shift key is always on.

I would like to try to disconnect the keyboard and work with an external keyboard. Is it easy to disconnect the keyboard?

thanks again, Serge

yes, I tried that and it works. The catch to start from the normal keyboard, I have to start with command V (verbose) or with the option key. Otherwise it starts in Safe boot as the shift key is always on. with the option key on, it does not bring the list of start up drives. with the option +command + P+R it starts from the recovery partition.

My next question: Could it be just the cable of the keyboard? is it a big deal to change that? expensive?

thanks,

serge