12 Mar
2004
12 Mar
'04
12:52 a.m.
This is fixable. It is caused when some material is
magnetized. The process to fix it is called
'demagnetizing'. The theory is simple: You apply a
changin magnetic field (for example, that created by a
coil with 60Hz AC), and graduately decrease the
strength of the magnetic field (for example, you pull
the coil further away from the monitor while moving it
in circle). It will fix the problem. Some monitor or
TV has build in circuit to perform the process.
vax3900
--- Jules Richardson <julesrichardsonuk(a)yahoo.co.uk>
wrote:
On Fri, 2004-03-12 at 12:35, Witchy wrote:
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I had the same problem with a 21" Digital
job I
rescued from Compaq since it
was on its way to the dumpster. I lived with it
for a while until I
discovered the 'advanced' settings on the
OSD,
followed by something called
'purity' that directly affected the
colours on the
diagonals of the tube.
Assuming that the Iiyama is a Trinitron tube like
the DEC one you might have
a similar setting.
Ooh, thanks - I'll give that a go. I'm sure it does
have that option. It
certainly has vertical convergance which is nice;
that's what started
drifting on my 17" screen (with no user control to
tweak it) - I fiddled
with the back of the tube and got things back to
normal but now it's
going again and prolonged use gives me a headache :/
Hence I'm looking
for a swap at the moment anyway.
Later it started flickering and dimming, but
that's another story :)
Well this one apparently had "wonky colours"
according to the chap I got
it from, but I'm sure I made things worse shipping
it home. It broke
free of its moorings whilst going round a sharp
corner - one very heavy
monitor somersaulted across the boot of the car with
one hell of a bang
:-(
I'm amazed the tube didn't implode to be honest, or
I didn't smash any
of the boards. Net damage seems to be the loss of a
4" chunk of plastic
from front of the casing...
I am curious as to what the thin cable around the
very front of the
screen is supposed to do. That got somewhat battered
when the case
smashed. I currently have the plastic case off (and
hence this wire
uplugged) whilst I glue it back together, and out of
curiousity powered
the monitor up. It came up with a nice crisp normal
image. Odd. Probably
coincidence... it does suggest that whatever the
problem is is fixable
though (unless something's loose inside the tube
itself I suppose)
cheers
Jules