I have a MSI CR700 laptop and it does not switch on at all I have been told could be the motherboard, if so does anyone now where can get one. Here is a video to show what does: https://www.youtube.com/watch?v=bJGhAbVhC8c
You could try eBay. Failing that, you'll just have to throw it away and buy a new one. That's the downside of laptops.