So I just bought an iBook for really cheap off craiglist and it has a little issue. The HDD was just replaced because the original failed. Upon booting it fully booted and then on the desktop it blacked out. Held power button down and booted again. Ran for 5 minutes then went black. I have reset the pram nvram and pmu but hasn't seemed to do it much good. Any ideas? Im thinking the logics on its way out.