Does the time vary atall or is always almost exactly the same? If you turn it on and do literally nothing does it still do it? Or does it only do it if you've already logged in?
My acer aspire laptop shuts down after a few minutes of turning it on.
It shows no other problem.
Hi, you don't need any other problem, the problem you have is enough, what happens when you press the power button again? When it shutdown, does it lose all power, do you have a LED that stays on after the shutdown? More details will be useful.