Hello, I've got a old laptop Lenovo G560, and the screen after the Lenovo startup screen stays black with a little backlight. When I push caps lock or num lock the light indicating that caps or num lock turns on with some delay. Even when i push five or more buttons it starts beeping. I tried connecting another monitor but with the same result, unplugging the battery and charger and pushing the power button then plugging everything Back. Nothing. Anybody got any suggestion ?