What procedures are needed when nothing is viewed on the monitor although the system running?

When nothing is viewed on the monitor although the system is running, the user is suggested of following the procedures mentioned below:

• To turn off the system and unplug the power cable from than main system;

•To remove the RAM from the slots;

• To clean up the connectors of the RAM rubbing with an eraser;

• To clean up the slot of the RAM with a hard brush;

• To turn on the computer without installing the RAM, and notice whether you get any beep sound;

• To turn off the computer, and again turn on after installing the RAM, if there is beep sound.

• If there is any beep sound, it is to understand that the RAM is faulty;

• To instal a new RAM if there is no display yet:

• To instal the RAM, and check again, Faulty RAM is the reason for at least half of the display problems