I need your help. I received some RAM for Christmas, a generic stick of 512MB made by Samsung. I opened my 1.6GHz G5 up and put it in, but it didn't recognize the new RAM. That's when I found out that it needed to be installed in pairs. "Oh well," I thought, "I'll just get another stick and everything will be fine." I moved the RAM back to it's old configuration and booted - yet it didn't boot. The power light on my display was flashing once about every 3 seconds, as was the power light on my g5. I turned it off and moved the RAM around - no luck. I did it about 3 times and still it wouldn't boot at all. What worries me is that it doesn't chime - the fans rev up, and then nothing but flashing lights and a blank screen. I ended up leaving it like that for about 15 minutes, and then all the fans kicked on high and made an enormous racket. I tightened the video card, and I made sure the RAM is in securely. What could this be?