Iphone 4 bricked restore won't start

So my iphone just happened to go into a coma yesterday evening and I tried to turn it back on. I looked down to the cable connector on the bottom to see if there was any water damage. No red indicator. few hours later, I read that if you hold down the opwer and home button at the same time, it will reboot. However, I've held the buttons for MORE than 30 seconds--up to 3 minutes. Not to long ago, I also read that you should plug in the iphone and hold the two buttons, commencing the restoration process thingy. Again, held it down for more than a minute. I even tried it on my aunt's laptop and it still won't work. Either I'm impatient (I listen to music alot so it's like a drug), the battery/hardware failed, or I'm just having back luck with technology. So yeah, any advice or help? Thanks

-Mark