I have a jailbroken iPad 2 running iOS 7.1 2 but it seems to have a problem that it can't be charged. I've tried with lots if different adapters and wires but it just won't charge. When the iPad is dead, I plug it in to a wall adapter and it turned on by showing the apple logo. But when on the lock screen it does not charge. I tried all of the wires and adapters and it works just fine on my iphone, but not my ipad. Please help me ASAP. Thanks.