|I have a Win7 system I constructed from parts last year. When first put together I had an occasional problem turning it on. Wouldn't come up until I switched off power then back on. Finally traced it when it was on a bench and I ran shutdown (supposedly successfully) but the fans kept running. Power supply was still on but CPU was off. Had to hold down the power button for a forced off when this happened. Later that problem disappeared spontaneously.|
About six months later, a different problem started when the system would shut itself off without warning, then spontaneously restart. Fried my clams because the first time I lost 2 hours work. Then it would shut down occasionally (sudden blank screen followed by a restart). I learned to save my work occasionally in antitipation of the crash. At the recommendation of a repair place I replaced the power supply. During that operation I think I unseated the memory chips (don't know how) because it wouldn't come back up until I removed one of the chips and had the other in the second slot. After that, no more crashes but only running on 2Gig.
I took it into a computer repair place 180 miles away last Thursday for a checkup. They replaced the mother board, checked both my chips and said both were fine. At my request, they populated memory to the max (8 Gig) which included the memory chip I had pulled. Since then, the system has crashed 4 times with the same symptoms (comes back up immediately).
Does anyone know of anything about a marginal memory strip that would cause the above behavior because this has only occurred when both my original chips were in the system and not when the one was out? Or is there any other cause I'm not seeing.