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N_Cook

On 23/11/2015 21:10, wrote:
N_Cook wrote:
I'd like to eliminate a problem of syncing between pc and projector
firstly.

What was the connection to the PC - VGA, HDMI, other? VGA has separate
sync signals, and an intermittent cable or connector might cause
something like this. People often bend the last few inches of a VGA
cable quite a lot, if (for example) the connector is on the right side
of their laptop but the cable needs to run off to the left. Sometimes
they will set their laptop on top of the cable, which might cause
intermittents to show up if they use the keyboard or trackpad during
the presentation.

If the projector was on the ceiling, with a cable routed through the
ceiling and wall to a socket on the wall, maybe that cable is going
intermittent.

Matt Roberds

That was quite possible. In a public meeting , so was not able to fully
explore at the time, VGA connection. The information was there in the
image, just parts of it were breaking. The VGA socket of the speaker's
laptop looked as though it had the remnants of a sandwitch or something
on the VGA socket, which I wiped away before connecting. In the break I
powered down and reseated the connectors but , as male to male lead, I
did not think of reversing the lead, continuing problem to the end of
the talk.
The problem never returned with trying with 3 other laptops