I recently started experiencing some issues with a lightly-upgraded AcerPower FH running Lubuntu 12.04. I had swapped out the original single 512MB memory stick with a pair of 1GB sticks (which passed Memtest+), and that all worked out pretty well for a while.
Then after almost a couple months, the system stopped booting past the BIOS screen. When I pressed the power button, the screen would either show the Acer logo and then stay white with fans at full blast OR the case LEDS would light up (with fans), then everything would shut down for a few seconds, then it would reboot by itself and exhibit the same behavior as before.
At first I thought the issue was a bad power supply. So one brand new Corsair PSU later (along with pulling the CMOS battery just for good measure), the issue didn't go away. So I pulled one of the RAM sticks, and lo and behold, the system booted fully. So just a bad RAM stick, right? But when I swapped the two sticks, it still booted, so I don't think that one of the sticks is at fault.
The mobo's RAM limit is 2GB, so I should be all set and good. I've seen stranger things, so I'm not ruling anything out (even software?). So, is there anyway I can the system to boot with two RAM sticks?