[Serious] Game is not loading after champion select

As the title says, the game is not loading after the champion select screen, not even the League of Legends logo comes up. I've run the hextech repair tool, firewall is allowing EVERYTHING league related. Tried logging into other accounts, even on other servers and still, same problem. I've uninstalled the game and reinstalled it and still, not working. Please sort this, I've lost lp on two ranked games, probably a load of honour too. Many thanks Lardthor.
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