I have no idea.
You haven't told anyone what model system you might own.
(at least, not in this forum thread.[url=http://forum.java.sun.com/profile.jspa?userID=907314]You have a V240 in another posting[/url])
Use your system warranty or service contract
and contact your local Sun support center. Open a support case.
Sun's techsupport will be able to provide accurate information.
http://www.sun.com/contact/