ipad doesnt start (boot loop) ??

Sorry, but your question is not clear.

You probably don't even have the faintest idea how difficult it is to give appropriate remote assistance to those who do not specify relevant information (device model, version of the operating system currently installed, detailed description of the problem you are encountering, circumstances in which it occurs, etc.).

If you want to be helped, please help us to do it in the best way.

Thanks

Giulio