Hi my sony vaio vgn-sr13gn, shift key does not work at all. not even in Command promt. Both shift keys don't work. What can I do?

A friend of mine has the same problem and i stumbled on your question today. This problem occurred with the Vaio VGN-FZ11E, after very very modest usage, no scratches or damage visible whatsoever.

There's one option out there:

"I found that if you hold down both left and right shift key at the same time (did this for several seconds), it somehow solved the problem. Hopefully that fixed the issue. Also, go to control panel, click on accessibility options..in the keyboard tab, click on the settings buttons for sticky keys, filter keys and toggle keys and deselect the option to use shortcut..hopefully this will help you and other people that have had this problem."
Quoted from here

If that doesn't work, seems to me the remark of Benwabnick seems to be the solution, as posted below.

benwabnick
Rank: Guru Hi my sony vaio vgn-sr13gn, shift key does not - sony.gifSony Expert
Rating: 89%, 428 votes
the contact underneath the shift key itself is starting to go bad. Its a common issue with sony laptops, the keys can wear out pretty quickly. You'll have to get another keyboard.

BR