When i turn on computer check signal cable hdmi Tags: Flat Panel Monitors Computer Monitors Cable HDMI Samsung Peripherals Last response: July 24, 2012 8:00 PM in Computer Peripherals Share joehatch July 23, 2012 4:50:18 PM when i turn my computer my samsung monitor stays dark, except for check signal cable box floating around. Can anyone explain to a computer illiterate. Thanks, Joe More about : turn computer check signal cable hdmi PhilFrisbie a b C Monitor July 24, 2012 8:00:12 PM Most likely the cable that connects the monitor to the back of the computer is loose at one end. m 0 l Can't find your answer ? Ask ! Publish Read discussions in other Computer Peripherals categories Printers CRT Monitors Flat Panel Monitors Digital Cameras Webcams Scanners Logitech !