Hi, I have this recurring problem with my monitor, a Samsung syncmaster BX2331. It will lose the signal from the graphics card or is shutting off and back on repeatedly, I am not sure which it is but I am losing my picture. This problem happens randomly and there is times when it will be fine for days or more. I thought it was the connection because when I wiggle the HDMI cord the picture returns but I am not certain, I have changed cables a couple of times which helped at first. I have read some forum questions and people are saying its a problem with the monitor power supply, but I am not certain if its the input, power supply, or a video card problem.