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My Samsung P2450H 24" display is connected to DVI-port. Last night the display turned itself on showing a box "Analog...". This morning turned it on, complained "Check the signal cable". Disconnected and reconnected the cable, but it did not cure the situation. Replaced the DVI-cable with VGA-cable and it is OK now. No big deal, but I'd like to utilize DVI. Purchased it last August.

Just wondering could it be a display- / graphics card- / cable-related problem?

Thanks in advance.

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I have exactly the same problem using a stock Dell 19" monitor. What graphics card do you have? – Joe Taylor Jan 28 '11 at 15:23
@Joe Taylor: MSI NX8500GT – Aki Jan 28 '11 at 15:29
up vote 0 down vote accepted

I had a viewsonic monitor (VP2030B) that had the same class of problem. I think the problem was (in my case) that the monitor defaults to analogue, and the card will give up trying to transmit a DVI signal if it doesn't detect a DVI monitor. Then the monitor gives up listening for DVI and drops to analouge mode. As the video card is no longer transmitting a DVI signal the DVI on the monitor won't pick it up, even if you try to switch to DVI. Much hilarity and nearly £1000 spent on different KVM switches ensues to no avail. Monitor eventually replaced.

Get a DVI-D only cable, so it has no analogue signal to pick up. If your problem is anything like mine, this should fix it.

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Thanks. Had to install "MagicTune" software that came with the display. The firmware of the display can be manipulated with it and in this case the signal source / default timing settings were the reason for the confusion. – Aki Jan 29 '11 at 12:17
Welcome to the ranks of the Stack Athletes. – Dennis Williamson Feb 27 '11 at 15:01

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