TS3048 My Keyboard won't turn on!

I forgot on my mac it then it wouldnt reconnect then it wouldnt turn on!

Sounds like something needs returning, but do you have an old USB KB to test with?
Or...
Bootup holding CMD+r, or the Option/alt key to boot from the Restore partition & use Disk Utility from there to Repair the Disk, then Repair Permissions.
If that doesn't help Reinstall the OS.

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