Solution to when the screen goes black in champ select (in any mode)
I kept having this issues when the screen would go black when entering champ select (in any mode) and I'd be timed-out because it would rarely load properly berfore the time ran out.
In my opinion, it has something to do with the friends list (if you have a lot of friends).
In order to fix this, make sure that all the groups from your friends list are closed and then queue into any mode, it should work now.
Hope this helps all of you that got timed-out/banned due to queue dodging (I've had 2 such dodges yesterday).
Cheers!
P.S.:
In case Riot had not figured out the problem, you're welcome RITO :P
P.P.S.:
Shameless advertising incoming:
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P.P.P.S.:
DELETE TEMO PLS!