Hi there, I got an Asus vk248h from a neighbour that had it in his (dry) cellar. I can turn it on, but wether I use pre-tested hdmi or dvi cables, it says "no signal" and goes into standby. The strange thing for me is: When I connect the hdmi cable to my laptop or my pc (tried both), the monitor wakes up from standby, so some sort of signal must come through, just to tell me again "no signal". Is this a know issue, something an amateur can fix or does it sound more like a circuit problem?