nevche on "Blank page"

Hi Everyone,
I have a problem with my blog - all of a sudden it started displaying a blank front page. Posts and pages also don't work. I haven't changed anything for months and it just seems to have happened. I looked through other treads for a solution - since I've deactivated all the plug-ins, tried changing the theme and renaming the catche.php/reloading/renaming again and looked into phpadmin for any errors but didn't see anything. I could log in into the admin panel just fine. I'm not sure what else to do.. I'd really appreciate any help. :)