I have a Lenovo Z560 laptop. This morning I started my laptop, but wasn't welcomed with the lenovo splash screen. Instead I was getting black screen. I could identify that laptop is working fine as I could hear boot sound from the speakers. I have tried replacing laptop screen and the connecting wire. But nothing could help. Someone suggested to use an external monitor. I can see my windows running in external one. I have also shown laptop to few technicians. According to them the fault is with motherboard. What could be the source of fault, is there an alternative to fix it or an easier way?
P.S. I am using Windows 8 (32-bit).