ralph@laas.laas.fr (Ralph P. Sobek) (12/06/88)
Just the other day my monochrome SM124 monitor on my 1040 ST started waking up flakily! Upon turning on my system the monitor would present a shaky screen during boot which would last a few minutes and then go away. The shakiness was most visible around the edges. Is some part giving signs that it's wearing out? My monitor is not anymore under guarantee so any information that I could look at (I'm not a specialist, but my friends ...) would be appreciated. Even more astounding, these last 2 days the problem seems auto-magically to have disappeared. So what's up? As an aside, when I turn on my monitor I have these faint diagonal scan lines on my screen (what's the proper name for these lines?). They get fainter after awhile but never go entirely away. (They are faint enough so as not to interfere too seriously.) Anybody know what to do here? -- Ralph P. Sobek Disclaimer: The above ruminations are my own. ralph@laas.laas.fr Addresses are ordered by importance. ralph@lasso.uucp, or ...!uunet!mcvax!lasso!ralph If all else fails, try: SOBEK@FRMOP11.BITNET sobek@eclair.Berkeley.EDU
derek@hsi.UUCP (Derek Lee-Wo) (12/06/88)
In article <257@laas.laas.fr>, ralph@laas.laas.fr (Ralph P. Sobek) writes: > Just the other day my monochrome SM124 monitor on my 1040 ST started > waking up flakily! Upon turning on my system the monitor would > present a shaky screen during boot which would last a few minutes and > then go away. The shakiness was most visible around the edges. Is > some part giving signs that it's wearing out? My monitor is not > anymore under guarantee so any information that I could look at (I'm > not a specialist, but my friends ...) would be appreciated. > I had the very same problem with my Commodore monitor for my C=64. I never did figure out why it did it. I would just let my monitor 'warm-up' for about five minutes, after which it would work perfectly. -- |Derek Lee-Wo, Health Systems International, New Haven, CT 06511. | |E-mail address :- ...!harvard!yale!hsi!derek. Phone :- (203)777-3125. | |"Hear me now, believe me later". |
ugthomps@cs.Buffalo.EDU (Gregory Thompson) (12/06/88)
Greetings,
I haven't had your problems with a monochrome monitor, but I have
had another problem that you might want to think about.
(Other people on the net....if you can explain what happened here
I would be most obliged if you would inform me...also this
is a word of caution )
One day while I was at work I turned on an Atari 1040ST and proceeded
about my business. After about ten minutes I had to do a warm reboot.
The monitor was ON when I did the reboot, and upon rebooting the screen
produced a somewhat loud SNAP and the machine continued booting. When
it was done the screen had one somewhat bright line going from 25% in
from the left to 25% in from the right in a somewhat arced (down) line.
There were several curves with the same curve as the bright one, but
they were much dimmer. That's all the video there was.
Since then I have not had the time to take it to our repair shop
so I do not know what is wrong with it. Again, if anyone has any
idea what happened I would like to know. And again, a warning
to people out there with mono monitors (at least), if you do
a warm reboot, shut your machine off first.
er...I mean monitor.
- Gregstowe@silver.bacs.indiana.edu (holly) (12/07/88)
Greg Thompson's mono monitor went *snap* and died... Greg (and anyone else who is interested), We've seen three mono monitors in the last 2 months come into our store with a blown capacitor. I'm not the one with the EE degree, so I can't tell you which one it is. When we were going through the first one to check it out, we blew a couple more caps, and it made that snapping sound. Sometimes the video just shows a line, sometimes it's black when it happens. Was the green power light still on on the front? Anyway, if it's that same problem, it is fixable. You might try taking it to your friendly neighborhood dealer and asking him to look at it.
piner@pur-phy (Richard Piner) (12/07/88)
In article <2803@silver.bacs.indiana.edu> stowe@silver.UUCP (holly) writes: >Greg Thompson's mono monitor went *snap* and died... >We've seen three mono monitors in the last 2 months come into our store >with a blown capacitor. >Sometimes the video just shows a line, sometimes it's black when it happens. >Was the green power light still on on the front? >Anyway, if it's that same problem, it is fixable. You might try taking it >to your friendly neighborhood dealer and asking him to look at it. I've fixed this problem on my mono monitor more than one. It is a power supply filter cap that goes south. It a long way from the regulator chip (other side of the board), but it's easy to see that it's gone. Just open up the monitor and go looking for a blown cap. I mean really blown. It takes a 2.2 micro farad to replace it.
c91a-ra@franny.Berkeley.EDU (john kawakami reader) (12/08/88)
Here are some "problems" I've had with my SM124: When the reset button is pushed in, there is a high tone coming from the monitor (this is only occasional). When the system reboots (from reset or bombs) the monitor goes "click" (the monitor, not the speaker). The screen appears to be losing focus, and adjusting the focus doesn't make the image any sharper. The corner of the screen shakes when other appliances are on (the magnetic field problem that is "cured" by moving away from the source of the field). The fewer pixels are lit, the darker the screen gets. A fix for this was posted a long time ago--could someone repost it please? When I place a large magnet on the screen, the image bends into weird shapes, and stay that way :-) :-) John Kawakami c91a-ra@franny.berkeley.edu ..but where's the line _noise_ eater???
crewman@bucsb.UUCP (Jerry J. Shekhel) (12/08/88)
While we're on the subject of monitor troubles, here's mine, and I think this one's been discussed here before I got USENET access, but anyway, here it is: When I was in the market for an SM124 monochrome, I couldn't find one without this problem (Jun-Sep '88). It seems that when the screen is mostly black, like when using Mark Williams msh, and there is very little white stuff on the screen, the white stuff quickly fades out of view. For example, if I call up microEmacs on an empty file, it comes up with one line of white text (the status line), which gradually fades out. When I play Megaroids, by the time there are only a few small things moving around on the screen, they're so dim I think I'm going blind! I went through 4 monitors with this problem, all made in December 1987, and they all had this problem, while my friend's old SM124 works fine. I finally bought one (I needed one for the Magic Sac) because it did not seem like a serious problem (in most cases on a bright windowed screen it would be unnoticeable), but now I use msh and Minix, and it's really bothering me. Please mail me any suggestions for a fix, or any other info would be greatly appreciated. -- Jerry
jf@laura.UUCP (Jan-Hinrich Fessel) (12/09/88)
In article <8096@pasteur.Berkeley.EDU> c91a-ra@franny.Berkeley.EDU (john kawakami reader) writes: > >Here are some "problems" I've had with my SM124: >The fewer pixels are lit, the darker the screen gets. A fix for this was >posted a long time ago--could someone repost it please? > Me too! >When I place a large magnet on the screen, the image bends into weird shapes, >and stay that way :-) :-) > This Feature is also enabled on Mac/VAX/SUN Monitors, as far as I know:-) ;-) Jan-Hinrich <jf@unido.uucp>