Hello, I have an LG Flatron W1930S with a 12V power source and i use a VGA-to-HDMI adaptor and sometimes my screen would turn off and on 1 to 4 times, after on the screen would appear a lot of red, grey, white pixels and i need to remove the hdmi from the pc and put it back in to work , this time I removed the power source a few times and I rotated the cable vga heads to the adaptor and now It doesnt show anything it just says "power saving mode" ?