What should I do if the computer powers on but there is no signal to the monitor?

First, ensure the monitor power cord is connected and the monitor is turned on, and try selecting different inputs. If you hear 3 long beeps, remove all memory modules and install only one in the DIMMA2 slot and restart; if you hear 1 long and 2 short beeps, remove and reinstall the graphics card and restart. You can also test with another known working graphics card. (Page 67)