Iphone 4 is stuck in recovery mode?

Hello. My problem with my iphone 4 is that itunes can't restore it, so I tried tinyumbrella, sn0wbreeze, redsn0w and iFaith but nothing works.
I googled it and tried almost everything, even the basic power/home buttons…
The thing that happens with everything I've tried is that the iPhone disconnects and it reboots to the same recovery mode. The USB is new and the ports aren't the problem.
The iphone stays connected until I try to restore it.
Any advide/help is appreciated.thanks!

You just gotta keep trying. My go-to solution is Power for 3, Both power and center for 10, only center for 15 more. Just keep trying