My laptop recently started having issues turning on. It works and then will not turn on for a few days then works. I put in my battery and my backup battery and had it plugged in all at the same time to see what that did. When it did start I went to device manager to see if i had any issues and nothing appeared. If this was a defective power supply wouldn't the battery boot it up for a little bit since they are both fully charged? The laptop is a newer sony vaio (which I would not recommend anyone purchasing) it has a 3.2 intel processor and 512 ram with a 17inch screen. I bought it sometime last year so its not that old. Any thoughts?