4 Oct
2005
4 Oct
'05
10:47 a.m.
Hello all,
Are you the guy who's been asking for scheamtics over on hpmuseum.net?
I'm experiencing some monitors in the last time, mostly, but not only
from HP, with the effect of some kind of small bubbles or shell-like
failures in the flront part of the crt-tube. Somewhere I read the
description of "screen mold".
Some of them seems to be stored at a lower temperature, more specific at
changing temperatures, in a garage with temperatures somehow closely
related to outside.
Does someone knows this effect, has an explanation of it's source (is it
The CRT faceplate is made of 2 pieces of glass bonded together (I think
it's like a laminated car windscreen, the idea being to support the glass
if the CRT should implode). It would appear that whatever was used for
the bonding either grows mould (fungus-type-stuff) or chemically changes.
At least one person here has used a thin wire to cut the bonding, then
removed the front piece of glass, cleaned it up, and rebonded it. It
sounds like a dangerous project to me, not only because the CRT could
implode while you're cutting it, but also if you don't get the bonding
strong enough when you put it back together and the CRT then
subsequnectly implodes, the results would be very unpleasant.
really temperature related?) or how to avoid this
problem. Some of these
monitors (esp. of a HP9845) are looking so badly, that I don't dare to
power on.
Which 9845 monitor do you have?
-tony