On Wed, 17 Oct 2018 22:46:52 -0400, Paul
wrote:

wrote:
I discovered something that surprised me - maybe someone can tell me
why?

I connected my monitor to two PCs, one DVI, the other VGA. I planned
to used my two PCs together, but never at same time. Guess what? My
PC connected with VGA worked alone. buy stopped working once I
connected the DVI cable. The DVI PC worked fine. I even unplugged
power to the DVI PC!! Now I am plugged to only the VGA PC and all is
fine. What don't I understand?

This is all because my MINIVIEW SYMPATH 4-VGA-PC
monitor-mouse-keyboard-connector quit working after several years use.
Just quit. Further, my cables no longer want to want on the Sympathy.
Seems strange.

I am discouraged to say the least.

Johnny

They share some resource they were not supposed to have shared.

If this was my kit to debug, I'd have the ohmmeter out and have
all three devices disconnected from power. See whether the VGA pins
on the DVI-I connector on the monitor, are in common with the
VGA pins on the VGA connector on the monitor. The two monitor connectors
could also share a common SDA/SCK (serial bus for EDID monitor resolution
info).

Using the make and model number of LCD monitor, I would be looking
for Newegg customer reviews for this particular monitor. Someone else
will have seen this happen.

Paul

Then maybe what I canf irst try is a second monitor I have?
J