Well, last night it struck again. Came home from work, screen was black. This is after quite a few days of everything OK, including maybe 5 to 10 successful reboots.
Got the Grub errors at stage 1.5 - Error 21 then 5 straight Error 25.
Discouraged, I went to bed. But I shut it down completely. So this morning it started cold. Literally. My office [in the cellar] is rather cold, about 55 - 60 usually in winter. And in the Setup I have seen the CPU temp around 84 degrees usually.
And it booted up fine.
So ... it runs fine for days, then fails like it did back then, then boots badly and then boots fine when it's had a chance to cool off and take a rest.
But 84 degrees isnt all that hot anyway, right?
Still, does this start to sound like it really IS motherboard issue after all?
If so, I hope the other forums have some nice advice for shopping. I know little about all the different makes and models and why one or another board or card or RAM or power supply. I managed to put this one together myself, but it was just screwing the board in and sticking the cards in. I hope a new one will be as easy and as nice as this one has been