one monitor goes to sleep mode, another is fine

[rh71]

XP machine loads up but after 5-10 minutes, the monitor turns off (yellow LED) as if it went to sleep. Tried another monitor and it doesn't happen on that one - ever.

This behavior on the first monitor is erratic, sometimes it does it, sometimes not at all.

I'm posting this for a relative, so that's all the info I have on the machine/monitor. I told him to check the pins (male/female on the monitor side, I forget) ... and he says there's 14-pins (I thought it should be 15) ... the working monitor has 14-pins too.

What could be the problem? Looking for leads...

[dunbar]

Actual pin count is unimportant unless it used to have more pins then lost one (or bent one).
I have checked this in the past on several monitors; some have only 13 or 14 pins in the connector, some have all 15 pins.

Has the user recently disconnected the monitor cable of physically moved the system? If so, I'd suspect a bad cable. I have a monitor that can't stay away from blue tinted white stuff - I have to bend the monitor cable fairly hard to get rid of the color problem. In my case, it's caused by a color signal line dropping out of connection; but the same kind of problem can happen if a certain ground pin drops out on certain monitors, because that pin is telling the monitor whether it is connected or not.

[rh71]

Yes actually... the machine and monitor have been unplugged from each other recently. Whatever the case, would a simple replacement of that connector head (where the pins are) do the trick ? Is this part easily replaceable ?