In rare cases, some types of older hardware are seeing a bug where they get repeated timers instead of going through to matchmaking. A fix is already in for patch 4.21.
For the time being, a few things that might help are to close other programs when you are playing League (so that only League is running). If you write a Player Support ticket someone can help run through tech support options with you.
"Muh rare cases!"
http://boards.na.leagueoflegends.com/en/c/miscellaneous/kiV9lxOE-collection-of-riot-lytes-important-posts-on-the-leaverbuster-20?show=flat
Still waiting to for you to actually start following through, you completely ditched that thread right after you said you would answer our questions...Have some pride and dignity and actually do something for us instead of just make flashy Big Riot Post Plays.
I honestly would rather read you say "WE FUCKING FUCKED IT UP SORRY GUYS!" for once than saying "yeah its a super rare incident, here are some random stats that you can't verify to show that no one gets these problems, optimize you East Coast Plebs ^.^", you know Lyte, at a certain point, well it is way past it, people stop believing anything you say because you don't own up for the many things that is blatantly on your end and constantly always insisting that it is always the players and customers fault really isn't an amazing paradigm to keep said players and customers to continue playing and supporting this game. It is like talking to a child that broke your window and it says "nuh uh, you did it!" then said child keeps breaking more windows and you tell them to stop and then they say "you ain't the boss of me!", but in this case, the child somehow manages to evict his parents out of the house or calls child support services and gets the parents arrested for telling him not to play with a baseball bat near all of their windows.
Don't worry Lyte, I expect you to turn tail and not respond to any of our posts once they actually are reasonably well put together enough to put stress on your PHD credentials, the only "fun" and easy posts to answer are the ones when people get banned and then you smyte them.
PS: Does my internet connection looks like it needs to be checked to show how pissed I am? Also I DID send it a ticket to support a while ago to help me understand why do I get games where I can't connect to them at all and get past 100% loaded at the loading screen, it has been almost six days, I have yet to get a human non copy and paste message yet out of the two I got, one to tell me to send diagnostics and then another to tell me I got my ticket transferred but bumped to the bottom of the queue for bumping it.