Android's "Check for updates" button not doing anything for you? Yeah, it'll be fixed next year
Yeah, turns out it's not working as intended. See, the idea is that, if there's a new update for your device, which still hasn't been automatically pushed to it, you should be able to manually start the process. But the Check for update button just doesn't work.
The bug has been solved and the "Check for update" button will work again... next year. This has been made clear by Googler Elliott Hughes, who posted on the issue. According to him, the issue was spotted and fixed way too late for a hotfix, so we'll have to wait for the next Play Services update, which will be coming (probably early) in 2018.
FCC OKs Cingular\'s purchase of AT&T Wireless
Things that are NOT allowed: