Acer Aspire 5520 won't start

I was using my laptop the other day and suddenly it just shut off. When I push the power button it goes green and the indicator light on the front for the power cord goes green but the battery light is red. I have tried removing the battery and going with just the cord, but the power light goes green and quickly clicks off. If I have just the battery in, the power light goes green and the screen starts to come on but then goes out. I have tried a new cord but same thing. Any idea? I have had it for two years with no other problems.

Just a quick google