When this problem occurred last night I was too tired to trouble shoot past simple rebooting and pressing the rest button on the mobd. I diconnected the power from the PC and the monitor last night and then this morning, after reading many old comments about this error code, I decided to remove what very few USB devices I had plugged in and started up the PC and it gave me the error 79. I reset the mobd again and then it started up fine and now seems to be working perfectly. My temps in my system last night were in the low 30 degree range. I don't believe it was a heat related issue...not sure what it was but I will be watching out for any more glitches.