I have a Portege M400 laptop and the number 5 sticks. I have replaced the keyboard with a couple of other different keyboards, 5 still sticks. I have re-installed the Windows XP operating system, the 5 still sticks. I have used the other keyboards on other M400 laptops and the 5 does not stick.
What else can I do with this laptop to keep this from happening? It is not a keyboard issue or an operating system issue.