PCs connected to a 24" monitor keep restarting

[joydivision]

A customer phones me to say he has bought a new computer but its still doing it on his new computer. Monitor company says it can't be a fault with their monitor.

I have offered to test the monitor but he has a Nvidia 250 and I have a 8600GT. I would have thought a Nvidia 250 would be more than capable? Does anybody suspect it could be a power supply issue e.g its drawing too much power when the video card is asked to display an extremely high resolution? I haven't seen the computer yet, picking up the monitor this evening.

[ComputerClinic]

I doubt its PSU issue. Has he tried running the computer while its not plugged in to the monitor to see if it will stay on?

[joydivision]

He has tried swapping two monitors his 19" works fine on both machines, if he plugs is his 24" into to either machines the system just restarts. I will know more when I visit tonight. He is worried because the monitor company are insisting its not a fault with the monitor but I guess it could be.

[NYJimbo]

He has tried swapping two monitors his 19" works fine on both machines, if he plugs is his 24" into to either machines the system just restarts. I will know more when I visit tonight. He is worried because the monitor company are insisting its not a fault with the monitor but I guess it could be.

I've seen this when there is a short in the monitor cable.

[joydivision]

Thanks good tip :) I shall bring a spare cable, only have VGA ones no DVis in stock :(