So - I have a Dell Optiplex that is running a restaurant Point of Sale system. Recently it started locking up after booting into windows. At the restaurant, it would lock up about 5 minutes after booting into windows. By Lock up, I mean I can't do anything - including Control-Alt-Delete. I can still move the mouse.
At my house, it goes for longer... but after running it all day, i came back, and it was completely frozen - no mouse, no keyboard, just a windows desktop.
The Dell diagnostic lights on start up are lights 1 & 2 - and then 1 & 3 & 4. According to http://f5k.wikia.com/wiki/Front_Panel_Lights_-_Optiplex_990
- those lights indicate pending hardware/motherboard failure. I have no cards plugged in (just using onboard NIC, and VC).
I ran the Dell Diagnostic in the F12 setup menu after restarting. It failed on the hard drive test. I rebooted, and am running checkdisk now from Windows - but hasn't found any errors. My question...
Should I replace the motherboard or the harddrive? I did a memory check too - also made sure they were seated properly - everything checks out.
Thanks for your help!!!