Dell inspiron N5110

Hello my name is Svetlin. First sory for my bad english but i have problem with my laptop i have Inspiron N5110 it wass working fine and bifore 2 days i shut it of yestarday when i try to on it it wasent start and i hear 7 beeps on starting but this 7 beeps is onli if the kyebord is out if i put back the kyebord its stoping to work evryting just lights noting moro no sound no fan notink please help .. i try to conect it with external monitor but is not starting