Hi,

A while ago I got a used Eizo F56 monitor to use as a secondary screen
on my Dell Dimension with a Matrox G450 dual-head video adapter. I was
using an old Sony 15" but wanted the Eizo because a) it is 17" and b) it
has dual inputs, which is useful for connecting to two PCs.
Ok, so far, so good.

Recently, it has started flicking off for a fraction of a second,
accompanied by a little crackle noise. The screen starts to go dim and
the image seems to expand a little off the edges, but then it comes back
on again and returns to the correct size.
Sometimes this may happen 4-5 times in quick succession, then not again
for 30 minutes or so, then it might do it twice and again after only 2
minutes. I.e. pretty random.

It might be connected to heat or humidity, as when we had a couple of
very hot days recently it was doing the flicking a lot more.
I don't think it happens when I first power up the monitor, only after
maybe 5-10 minutes, when it has warmed up a bit.

I read somewhere about dust possibly casuing this problem, so I opened
up the back of the monitor and blew out any dust with a compressed air
can. There was some dust, but nothing much.
I alos read about sluicing the HT bits on the back of the tube with
alcohol, so I tried that as well. I used iso-propyl alcohol and left it
24 hours to dry.
I think these measures have improved the problem, although it still
happens. It's an intermittent thing though so I could be wrong.

Before anyone says, I know I should expect problems if I buy secondhand
old crap, but I'm a bit low on the finances at the moment, and I'd like
to get TFTs a bit later anyway, so this is a stop-gap

Any thoughts? Anything I can do to fix it?

John