well I know that warranty's are only valid in the country in which the products are made for. Warranty's never work internationally. But you're asking for a repair which has nothing to do with the warranty so this confuses me too.

You can also go to a third party repair shop and get it fixed, or order and LCD online and do it yourself (It's really not that hard, I open phones all the time and I'm no technician) but either way your warranty will be void. But then again, why does it matter if it's void if you cannot even use it right?