#1084 malfunctioning
7 messages in this thread
My 1084 monitor has started turning itself off. Everything will be fine
and then POP! (no actual sound) the screen goes black. Sometimes hammering
on the side will bring it back. Turning off the monitor for 1/2 hour will
bring it back. Obviously a heat related problem. Anyone have any ideas?
—–Paul—–
Paul,
It may be a short between one of the boards in the monitor and the
tube. The defect was documented in some magazine that I read some time ago
so I'm saying this right off the top of my head. A technician can fix it
by putting extra insulation on the wire hanging from the tube or
thereabouts. It'll take me a few days to find the issue in my garage.
Meanwhile, perhaps someone can give you a quicker and more precise
response.
Sincerely,
(Mr.) Gayle Lee Fairless
'Perfessor Fearless'
Paul,
I just remembered that the problem is the buildup of excess
capacitance. The POP is the sudden discharge of the charge which, as
you've noticed, does wonders for computer logic! The fix avoids the
discharge with more insulation. The high voltage wire off the tube, I
think, acts as a capacitor with the ground plate or one of the boards. Of
course, the charge builds up slowly and goes away when you turn off the
monitor.
Hope this helps!
Sincerely,
(Mr.) Gayle Lee Fairless
'Perfessor Fearless'
I appreciate the reply. I wonder if I have enough nerve to try a `fixit'
myself. The high voltage area has always scared me. Oh well.
Have you ever complained to your parents about sticking you with a girlish
name. On the other hand, ever seen the (ca. 1940) movie of The Man Who
Came To Dinner? One of the male characters is named Shirley. The heroine
offers to name her firstborn after him and he asks "But what if it's a
girl?". Seems Shirley was a boys name before S. Temple came along. We all
have burdens to bear. I, for instance, am fat, 45, and a bureaucrat.
—–Paul—-
Time flies like an arrow. Fruit flies like a banana.
——Marx——
You have Paul's black-out problem confused with the classic arcing problem
(which literally causes pops and flashes).
Possibly, but IMHO, this is one gremlin with more than one address!
Sincerely,
(Mr.) Gayle Lee Fairless
'Perfessor Fearless'
My 1084 had the exact same problem for quite some time. I found it to be a
bad solder connection in the monitor's power PCB. Resoldering the
connection ended my CRT-banging days permanently. 🙂