Iphone 4 Locked When Trying to Restore ? [Q]

I have jailbroken my iPhone 4 . Now I wanted to restore , and remove the jailbreak for some reason . But when I tried to restore , my jailbroken iPhone 4 has got locked. It is not even restored to factory settings either . When I try to connect it to my computer iTunes would not detect it . It only
shows Apple logo on-screen and some times battery and its no getting charged aswell.
Please help !

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