Won't Power up

Wife has a Gateway MT6831 Notebook. Batt. has power and ac cord in working. When she tries to turn it on, Nothing

Is it completly dead or it turn on but no display ?
if it is completly dead, it could be the motherboard.
but if it turn on and no display. try to reseated memory first.
if you have 2 memory, try to use only 1 memory. used it in every slot to test the memoy slot.
if it is still no display, your motheboard need to be repair.