Advertisements I'm trying to determine if I have a bad Harddrive, or if it could be a MB issue. If I unplug the unit for a while, and then plug it in, it will boot and run for maybe 10 min, but then suddenly it reboots, and the first time it might come back up for a few minutes again. However, it soons reboots again and then it will either continuously reboot or possibly eventually go to a grey screen without ever getting to the WOAFM screen. After this, all I can do is unplug it for an hour or two (to allow everything to cool off?) and then go through the same process again. I have gone through the QS54 test, which took about 2 hours, and passed all tests. Then I tried QS58 which never quite seemed to work like it's supposed too (GSOD), and instead just paused for a few minutes and rebooted again. Finally, I ran QS57, and it started like it should, GSOD, but while it said it would take about 3 hours to go through this process, it actually finished in about 1/2 hour. However, nothing is any better or different then it was. It still works as before, where it seems to work ok until the unit warms up, and then it starts to reboot. And the longer it runs (the warmer it gets??), the sooner it reboots and the less successful it is on each reboot. The fan is running and looks clean from the outside, but I haven't opened it up yet. The longer it runs, the worse it gets until it's bad enough that I can't even get to the QS point before it reboots by itself at about the point where you would initiate the QS routines. The harddrive seems to be running at all times, and it isn't noisy. It still has the original drive, so I suppose there's a good chance it's going out, but it seems rather strange that it passed all tests but still doesn't work for any period of time. Any suggestions as to what I should try next? Replacing the harddrive is no big deal, but I'm hoping it's not the MB, as I understand replacing that messes screws up the lifetime membership. thanks..