IPhone 4 ios 6.1 update problem, stuck flashing on and off?

This morning I tried to update my iphone 4 to ios 6 straight from the phone. It started loading the bar for a while, then it shut down. Now it keeps booting for about 5 seconds and shutting off, repeatedly. My home button is broken so I can't hold it down along with the sleep button. Have tried plugging it into my laptop, nothing. Help?

Added (1). I live in Aruba and there's no real apple store located on the island.

Only option left is taking it to an iStore to have the techies look at it. Either that or wait for the battery to run dead, then plug it in and see what happens. The home button is pretty essential in cases like this

Try to put it into DFU mode.
hold power and home for 10sec let go and keep holding home.
jailbreak after using the vid i made

Http://www.iclarified.com/entry/index.php?enid=23009