My VAIO Duo 13, product model SVD13225PXW started to turn off by itself when I'm using the laptop. What's wrong? Before this happens, it used to turn off by itself whenever I first turning on my laptop, which means that when I turned on once, it turned off and I need to do it for the second time before it really starts. But now the problem changes to turning off when I'm using it.
Please help.