Black screen when power on. No booting

John - Aug 12, 2016 at 12:22 AM

I'm using windows 7 in lenovo laptop. Whenever I try to pOwer on I couldn't see anything on the screen. I feel like the screen is disconnected or the connection is short somewhere. Can anyone tell me what could be the exact problem because technician at repairing shop is asking me to replace display and some graphic panel.please help me out.
John bhat