Unhappy [Q] Lenovo IdeaTab A2107A-H Not Turn ON !!!

Hello guys.
i have some problem with LenovoA2107A-H , after i buy it about 6 month ago for my sister.there was no Call option in Tablet.
so i try to do it myself.but after i ready everything i starrt and got this error. ( see Attachment.)

and now , Tablet didnt Turn on.
Please any Help and idea to make tablet getting turn on its enogh ! i dont want call .. only Tablet getting turn on like before.
Attached Thumbnails
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