I have a weird problem that has me baffled. A few days ago, my wife reported that, when she went to run a program for our daughter on an alternate login, my machine was "off." I asked her if she wiggled the mouse, would it come back "on." And she said no. She reported that the fans were still running, but the OS was not responding, and not even on. The monitors were on but had no signal.
I went into Windows logs and found some relatively worthless message saying "the last shutdown was unexpected." This is because I had my wife reset the machine to get it started again. After a reset, she reported that it worked as normal.
I got home today and the same thing was happening again... No OS, but running fans, CPU fans, power source fans, but no OS. I took the covers off and cleaned the guts and aired out the components. I inspected it and no obstruction seemed to be apparent (I thought maybe the system was overheating or something due to a wire interfering a fan...).
So I'm not sure what's going on. No real updates or new software in the last few days to have caused this. I'm thinking maybe some kind of tool that will monitor my system and report to me any failures? Does anyone know if any way to troubleshoot this?
Any ideas are appreciated.
chkdsk and turned up no bad sectors. HDD seems to be good. Off to do a memory test now...
Memory test yielded no problems, so I'm assuming the memory is good.
The good news is that overnight the machine is still running fine, EXCEPT:
I went to connect to the network and my network adapter was gone. I mean completely missing, no device at all. Troubleshooting revealed I needed to install a network adapter and its driver. I rebooted and all is well. Not sure if this is related but it sure is odd...
EDIT 4 Seems to be running OK all day. I have on-board video, so I will need to look into testing an external card for the next phase of testing. Thanks for all the good ideas so far.
I think the manual cleaning/air-out/inspection helped. Maybe my connections were loose and I snugged them in when I had the box open... I opened the box again, and just made sure everything was in its place, and I haven't had problems in two days.