The PC starts with 'one long beep and three short beeps' OR 'one long beep and eight short beeps' without any display Such a beep pattern is an indication of a fault with the graphics card which may have become loose or damaged. o Detach the monitor's VGA plug from the port on the graphics card and open up the case.
o Unscrew the screw gripping the graphics card and pull it out of the AGP/PCIE slot,
o Clean the contact strips at the edge of the card by gently rubbing them with an eraser.
o Fit the VGA into the slot and fasten it with a screw and restart the PC.