Many years ago my original Bondi Blue iMac died on me, in the middle of using it it turned of and after taking it to an Apple shop at the time they told me it was dead due to an Analog board (or so I think after all these years). Given the cost to repair it, it was too much to have him repair it. As of late due to some free time (finally...) and sort of an iMac fever over the new model , I have decided to go back and hopefully repair my old Mac before it becomes impossible. The issue as I remember was it wouldn't turn on any more after that one abrupt shut off during use, given that I can't recall the exact issue, I looked into what could be the reason in hopes I could fix it or replace the part myself at a relatively low cost. After some looking I found one of the most common issues was the battery on the logic board. Given that I decided I would check to see if that is was maybe the issue then, or could be now anyways, I decided to look into it, but by a whim I decided I would plug it in and see what happened anyways. It turned on... For a second or so. The computer ran for a few seconds with an orange light as I think I remember it doing back then, made the noise, then abrupt shut itself off again. It wouldn't do it again as the old issue was. After this I've become all the more confused... I began taking it apart to see if the battery was an issue only to now discover that the person who inspected it for me didn't put all the screws back in... he left it a mess inside. Depressing... Upon now getting to the battery too, its at 1.176V, well below its 3.6. So, what is going on here... From what I've read it wont run period without that battery anyways, so that is a must I guess, but could it also be that simple? But then why did it start up at all for those few seconds? Any help would be greatly appreciated. I know the iMac has no real use any more, but it was my first computer that wasn't a hand me down or leftovers from somewhere, my first REAL computer when I was a kid, so I can't help but feel I need to bring it back to life and let it say hello to its brothers.