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OK my phone hangs at the Sony Ericson screen when I power it on, when I plug it in it will actually boot in to the system but my touch screen will not work now I have tried Sony PC companion and update service which none of them work because when I try to load my phone in to recovery it load up as s1boot down load and I have even tried to install new drivers on my comp threw flash tools but the drivers wont take is their any thing else that I can do or do I have a permanent paper weight ?
edit ok so i fixed it i reinstalled the drivers to the point where the update service could read that i had a phone pluged in with s1tool but my touch screen still wont work and it still hangs at sony ercisson unless i have it pluged in - the touch screen randomly stoped working it wasnt droped or any thing 
Firmware is corrupted and probably there is also a hardware issue on touch screen or, worse, on motherboard
If your unit is in warranty take it to the nearest service center