Well I am turning to the masses for some help with this mystery. I have a 1.83GHz MB Core Duo that came with the standard 2 x 256MB of RAM. I installed a 1GB in slot "1" and booted up the machine just fine. The MB recognized the new memory and slot postions. Thinking that I'd rather have the new bigger stick in slot "0", I reversed the two sticks, and that's when the trouble began... For the last 2 hours I can't power this damn machine up. I tried several combinations and am sitting here with the original sticks installed, but it WILL NOT power up. Is this machine fried? Am I missing something? I have installed RAM for years on countless machines and have never encountered this! Please help - anyone? I am stressing big time!!!!