Um... I Have a similar problem about half a year already. When you turn on the system unit the indicator light on the power button Monica blinks, no picture. After several on-off image appears normally. After restarting the computer (more precisely, after exiting the BIOS), the situation usually repeats itself. Also Gigabyte (model I do not remember, 19" LCD). Laces DVI changed, other system units are not docked.