Strange problem with D-sub monitor cable

[Special K]

Last night I unplugged my monitor from one computer and plugged it into another. I turned it on and got a message that said "please check signal" So I unplugged the cord and noticed that there was a pin missing from the D-sub (isn't that what it's called) cable. It wasn't broke off or anything, it was just completely missing, as if something had pulled it completely out. At first I panicked, but then this morning I tried it again and now it works fine. Is there a problem here? Is it possible that the pin was never there to begin with, and isnt really necessary? Can I order a new pin to plug in to the hole (each pin appears to be plugged into its own separate hole, if that makes any sense).

 

[gsaldivar]

It's not uncommon to find pins intentionally removed from cables - I've no direct experience with this cable in particular tho...

 

[bozo1]

VGA connectors commonly have the pins that aren't used missing. Looking at one of mine, I see 2 gone.

 

[Special K]

Forgot to mention that it is an Optiquest Q95, if it makes any difference.

 

[Special K]

I found a picture detailing what each of the pins do here. According to the diagram, the pin I am missing is "Optional +5V output from graphics adapter". What exactly does that mean, and what graphics adapters require it?