I recently used redsn0w to make my device untethered. Now it won't turn on. iTunes said it was stuck in recovery mode so I did the thing in redsn0w to get out of it. Then I tried booting, didn't work. Tried downgrading it to a tethered jailbreak, didn't work. I get a message saying some like: something 60000 ms. Giving up... Help please.