Hello,
My NeXT mono monitor (N4000A) quit displaying properly. Symptoms were:
1) Over last 6 mo. or so, on start-up (this is only about 2
start-ups, machine running continuously in between), the middle 30%
or so of the display was compressed into a single (bright) scan line.
Top and bottom 30% were stretched, so the whole screen was
continuous. This problem cleared after running for 1-2 minutes.
2) 4 weeks ago, noticed that (even after the start-up problem) what
should have been a uniform grey background looked like it had small
light and dark horizontal flecks in it, appearing and disappearing at
something like the screen refresh rate. Made the background look
grainy and sort of seething.
3) (After I was gone for 3 weeks on travel), monitor now flashes on
and off on about a 1 Hz cycle time. A distorted and shrunk version of
what should be showing is visible near the center of the monitor
during the "on" times. There is a bright horizontal scan line near
the middle of the image, when you can see it.
4) On start-up, nothing shows for at least 2 minutes. After around 2
minutes (as I was powering off), image (as in 3) above) started to
appear. Have not repeated experiment to see whether it goes back to
the 1-Hz cycle or not.
Monitor has been running near continuously since I got it, in '96.
Is this a known/easily fixable failure mode? Anyone have
experience with this? I need the machine running and my record with
repairing computers is dismal so I'm looking for (and think I have
located) another monitor, but at some point I intend to take a crack
at fixing this one.
Replies to list if you please, in case this *is* a common
problem - I'll catch up as fast as I can.
--
- Mark
210-522-6025, page 888-733-0967
Received on Mon Nov 03 2003 - 11:57:53 GMT