STRANGE PROBLEM with Sharp Aquos LC 32GA9E

Hi everybody,
today I have suddenly experienced the following problem with my Aquos without any reason on all channel and inputs

The screen is cutted at the bottom and into the "cutted" part appears the upper part of the image again!

maybe this picture can help you understanding me!



what can I do? is it possible to fix it from service menu or do I need to call Sharp for assistance?
Hope you can Help me (and sorry for my English but I'm Italian)
Thank you very much,
ciao!