STTrouble

Thread View: net.micro.atari16

2 messages

[T] Back to Threads [V] Tree View [G] Group Articles

2 total messages Started by Evangelos Milios Tue, 04 Mar 1986 02:12

#103

Author: Evangelos Milios
Date: Tue, 04 Mar 1986 02:12

23 lines
1604 bytes



I had an unpleasant experience with two Atari 520 STs 
(the standard monochrome configuration), I received through 
mail order. The first one I got showed a screwy display a few minutes
after I turned it on for the first time. I sent it back the next day 
for exchange. 10 days later I received another one, whose display develops
a slight blurr about 5 minutes after turning it on. About 5 minutes later,
the blurr goes away, and the picture stays normal for the rest of the 
session. The same thing happens with remarkable regularity (plus/minus 
one minute - I timed it) every single time I turn it on after being off 
for several hours. Recycling the power of either the computer or the 
monitor after the first 10 minutes does not spoil the image.

Has anybody seen this problem before? Atari hasn't. 
Any fixes? Please answer fast, I only have a 10-day exchange period.

...Evangelos
-- MIT Digital Signal Processing Group

UUCP: {seismo,pur-ee}!mit-bug!eem
ARPA: eem@mit-bugs-bunny.arpa

Re: STTrouble

#125

Author: adam
Date: Sat, 08 Mar 1986 15:35

18 lines
1719 bytes

(Does something still eat this line? Rn doesn't.)

It sounds like either a thermal problem in the high voltage focus (is
the de-focus all over the crt screen) or posibally (but less likely) a
thermal problem in the crt gun structure itself.  The only way to determine
if I'm right would be to disassemble the monitor and play with the focus
pot while it is warming up, or use cold spray on it after it is warm.
It is not likely to get better but may stay that way for years.  If you
can do without it for a while, send it back.  You payed to have it perfect!
Mine is OK but note that since it works at 70 Hertz, and everything around
it is 60 Hertz, it is very subseptible to magnetic field interaction.  You
will know when the picture starts moving or waving at you.  I can't have
the color monitor on (but unused) and next to the B/W (12 inches) while I am
using the B/W.  Also, keep the power blocks (transformers) away from the
monitor -- especially the back.  Move them around the monitor with it on to
see what I mean.
	Good luck.
	Ken Adam

Thread Navigation

This is a paginated view of messages in the thread with full content displayed inline.

Messages are displayed in chronological order, with the original post highlighted in green.

Use pagination controls to navigate through all messages in large threads.

Back to All Threads