27 Oct
2015
27 Oct
'15
10:38 a.m.
On 27 October 2015 at 13:33, tony duell <ard at p850ug1.demon.co.uk> wrote:
By 'CRT' I assume you mean the evacuated glass
thing. The term is alas also
misused to mean 'monitor'
Indeed, the glass thing.
Before you go to all that trouble, why do you think it
has failed? In all
my time of working
on classic computers I've had exactly one mono CRT fail (and no colour
ones). Fail meaning
'gives nothing on the screen' -- I've had a few with phosphor burn, or
with low emission. But
those gave an image, albeit a dim one.
Purely because not only do I get nothing on screen but if I turn both the
brightness and sub-bright up full I can't see any glow or raster lines.
I've got at least 3 monitor 'units' that do this, one of them also smokes
but we'll leave that one for now, I guess it's old enough :)
The PSU is giving 22VAC for the screen and the monitor pins on the
motherboard give sensible voltages IIRC, The heater on one screen glows so
that's the one I'm using.
One problem at a time I guess, tonight I'll double-check the CRTC since I'm
assuming if that's dead I'll definitely not get even the garbage on screen.
--
adrian/witchy
Owner of Binary Dinosaurs, the UK's biggest home computer collection?
www.binarydinosaurs.co.uk