Hello guys. Please my laptop has been behaving somehow of recent. It started with the hard drive problem in which I received notification that the hard drive was about to fail. So, I changed it. But now, whenever I put on the laptop, a times it just goes off by itself. On few occasions, it does this before it finally stays on.

Another problem is that when I power it on with the button, it doesn't come on. The way I go about this is that I remove the laptop from charging, I remove the battery and press the power button for up to 30 seconds, after which I reconnect the charger and I press the power button and it finally comes up.

I use an hp probook 4530s. It does the same issue on windows 7 and 8, though it's currently on windows 8.

Please, can someone recommend a solution? I'll really appreciate.