Laptop that power on but no display follow this step by step tutorial
http://itrepairguide.com/laptop-power-on-but-no-display/

A lot of laptops these days do not have a vga port, but either a DVI or HDMI port, though the principal remains the same. Unfortunately, not everyone in these situations has an external monitor that will mate with the laptop. That said, all-in-all the advice in the article is sound.

Be a part of the DaniWeb community

We're a friendly, industry-focused community of developers, IT pros, digital marketers, and technology enthusiasts meeting, networking, learning, and sharing knowledge.