Iphone 4 wont turn on even tried sleep home combo..

[BobDeere]

Hi All..
bought a iphone 4 on Swedish ebay as broken/fault.. the damn things doesnt turn on..
was hoping the former owner didnt know the sleep home combo "10 secs both togheter"
so it was the first thing i tried when i received it.but with no luck..
any idea what i should try next?
i dont mind opening it since i have another one ill try to fix later..
was thinking to strat with these first as "light project"
the other one is in pieces..

thanks for your help
Robert

 

[Massie]

Have you tried plugging it into iTunes and/or a wall charger?

 

[BobDeere]

i didnt come with any charger so im using my cable fro my ipod connected to the usb in my computer,
for the itunes im just downloading it..
but nothing happens when i have the cable connected to the phone..