Sony Cybershot DSC-S650 won't stay on

One of the cameras we have here is a Sony Cybershot DSC-S650, and it worked fine for the past year or so until last week. The camera wouldn't stay on when you pressed the power button. The screen would flash on for a second, and then shut back off. We tried different batteries and that didn't work. I then found a post saying they had run into similar problems and were able to get the camera to stay on in picture review mode only, so I pressed the Play button and that seemed to get it to stay on longer, but it would die as soon as I put it into camera mode. On www.fixya.com I found someone else with the same problem and also what turned out to be the solution. First things first, remove the memory card. That way you don't have to worry about losing any pictures that may be on it, unless you don't care, in which case you can leave it in the camera. What they said to do on FixYa is reset the camera by holding down the power button, taking out the batteries and continue to hold it down for 15 seconds, and then put the batteries back in and turn it on. As soon as it comes back on, go into the menu an reinitialize the camera's settings. Apparently that resets the actual camera software and fixes the bug that supposedly causes this problem. It worked for me, but I'm not so sure I needed to do all of that. Make sure you check the batteries first. If they're not the problem, try using the Play button to turn on the camera and then quickly go into the Menu and reinitialize the settings (this DOESN'T mean to reformat the card). If that still doesn't work, then try the method given for resetting the software. That's the part I'm not so sure about, but I didn't bother looking into whether it's a valid way to do it or not, so feel free to try it if nothing else works. Either way, good luck!