Failing shutter, or something else, 5D2

Anyone have experience with the following:

Shooting tethered on an AC power adapter, firing some lights on a radio trigger and I've got a whole lot of photos showing poor flash sync (shutter blade visible at bottom of image) and had problems with miss-fires.

The radio trigger works perfectly, tried 2 of them, on the hot shoe and on the a cable from the sync port.

The shutter speed was at 1/200 and have never had a problem before with this speed with these triggers (lots of photos taken in the past in the same set up).

It happened first on a very hot and humid day, then worked properly the next day, which was cooler, but failed again on the next hot and humid day.

It doesn't seem like a failing shutter, in all situations the camera works perfectly.

It seems like the flash trigger mechanism is not working properly, hence the miss fires and occasional missed sync with the shutter.

Could be a "perfect storm" of trigger lag and being on the ragged edge of barely getting all the light in at 1/200. Did you try slowing your shutter a notch just to see if it still failed to sync?

http://strobist.blogsp​ot.com/2010/01/know-your-sync.html

When I use triggers its hit or miss at 1/200 of a sec. Most of the time it's fine but not all the time

1/160 works all the time.

How are the batteries in the triggers?

My 5D2 does the same thing at 1/200th. Seems like a common problem from what I've read.

booja wrote in post #13954848
When I use triggers its hit or miss at 1/200 of a sec. Most of the time it's fine but not all the time

1/160 works all the time.

How are the batteries in the triggers?

Triggers were fine, Elinchrom skyports with new batteries, and did it with two different triggers.

I've had issues with sync speed using off camera flashes, but never with the Eli's before.
This is a set up I used for a month before hand, and it was used for several months last year.
In every couple of hundred shots I would get one that didn't sync properly.
This was not a problem with shooting at the max sync speed.

But this time I was getting one in every 10, and a total failure to fire every 20 or so.
The problem seemed to be getting worse as well.


I wonder if the flash circuit on the camera is going faulty?