I actually just switched out a video cable today with fantastic results. I have a rather old LCD monitor attached to my computer. The signal path before today, from computer to monitor, was:
1. DVI out on video card
2. DVI to D-Sub adapter
3. VGA cable
4. Base of monitor
5. analog to digital converter built-in to base
6. DFP cable (used before DVI became an accepted standard) from base to actual display panel
With the purchase of a single DVI to DFP computer, my signal path is now:
1. DVI out on video card
2. DVI to DFP cable
3. LCD panel
Everything is now noticeably crisper, and the screen seems to be a touch brighter, as well. After recalibrating the monitor, I am now feel I have a new screen for the price of an $18 cable.
I had been meaning to make the change for a really long time, but never felt a need since the old connection worked just fine.
A perfect example of what happens with too many connections, everything still works but a little loss at each connection affects the outcome.