Re: Monitor - No signal
With the system powered ON, look at the top, right hand side of your motherboard. Do you see the Red Light? Refer to page 2-14 in your Users Manual, this is telling you your having a problem with the Memory.
Make sure the Memory Sticks are oriented correctly and Fully Seated in the slots. I would also clear the Bios (unplug the computer from the wall socket, remove the battery from the mobo, wait 1 minute and re-install the battery, re-apply power).