Why do I loose video at random times while it's running?
I just received my 2008 iMac and for some reason, my video blacks out and the Mac still runs. I can't tell if it falls asleep as my setting prevent that. I happens shortly after boot most times. I reset my smc as well as my pram and that caused it to stop for several days until it started happening as frequent as before. It is all stock except for a 2 gig ram stick for a total of 3. When it retains video it runs great. I'm just not sure what to do as I've never had to troubleshoot something like this before.
I pulled the new ram stick since I was thinking the video problem started shortly, it has had no effect, I have screen sharing on but it doesn't seem to work when the video goes out but I can connect enough to view the hard drive contents so I guess that rules out a random sleeping issue, but I've noticed putting the brightness on the very minimum keeps the prob from happening so far, I will further test
Update 2 12/30
I just installed a new inverter and the screen still blacks out even before login. I have tested doing a screen share with another Mac to see what I can see while it blacked, and my iMac is not responsive during the screen share. Is this thing just a lost cause?