mitchell@tci.bell-atl.com (Rob Mitchell) (11/23/89)
The whole image on my Color Monitor wobbles. It acts as though
there may be a magnetic field around, but there isn't. Besides, I have
a bunch of other monitors and tty terminals in my office that behave
properly (I've turned them off and 'sides, they're not close enough to
cause disturbance).
Any ideas?
--
Rob Mitchell Technology Concepts Inc. Sudbury, MA. 01776 (508) 443-7311
...!uunet!tci!mitchell mitchell@tci.bell-atl.com
Steep and Deep ... The only way (unless you own a Macintosh) korn@anableps.berkeley.edu (Peter "Arrgh" Korn) (11/25/89)
In <445@tci.bell-atl.com>, mitchell@tci.bell-atl.com (Rob Mitchell) said: > > The whole image on my Color Monitor wobbles. It acts as though >there may be a magnetic field around, but there isn't.... > > Any ideas? There is a known problem with Apple Color monitors within a certain serial number range of early serial numbers that exhibit this problem. About 2 years ago there was a Service Notice on AppleLink to this effect, saying that Apple Dealers should repair/replace the monitors at no cost to people who brought them in. My monitor was in the serial number range and exhibited the problem intermittantly, so I brought it in to my repair shop at U.C. Berkeley. It never happened for them, so they refused to repair it. I got real busy and couldn't deal with it then, and now it happens so infrequently that I haven't bothered. Instead, however, my monitor will no longer show a true black and has a faint border around the actual image on the screen (as if the brightness were up too high except it's not). Lacking time, I haven't pushed hard on any of the local dealers to fix it. Perhaps your monitor is in that serial number range? Perhaps you can find an Apple Dealer who is willing to honor the service notice (which, as far as I can find, is no longer on AppleLink)? Peter -- Peter "Arrgh" Korn korn@mica.Berkeley.EDU {decvax,hplabs,sdcsvax,ulysses,usenix}!ucbvax!mica!korn
chou@umn-cs.CS.UMN.EDU (Hsiang Chou) (11/27/89)
In article <19899@pasteur.Berkeley.EDU> korn@anableps.berkeley.edu (Peter "Arrgh" Korn) writes: >In <445@tci.bell-atl.com>, mitchell@tci.bell-atl.com (Rob Mitchell) said: >> >> The whole image on my Color Monitor wobbles. It acts as though >>there may be a magnetic field around, but there isn't.... >> >> Any ideas? > >There is a known problem with Apple Color monitors within a certain >serial number range of early serial numbers that exhibit this problem. >...... Can you mail me or post the serial number range? >..... >that I haven't bothered. Instead, however, my monitor will no longer >show a true black and has a faint border around the actual image on the >screen (as if the brightness were up too high except it's not). Lacking >time, I haven't pushed hard on any of the local dealers to fix it. > I had a similar problem as yours. My screen won't turn black in the image area even when I turned the brightness and contrast all the way down, although the border is always black. I fixed this problem by turning an undocumented knob on the back of the Apple color monitor. It's located at the top of a column of knobs (under a hood) including Horizontal and Vertical Sync. You can find this place from your monitor's manual. However, no documentation is given for this knob which has an icon of the sun (i.e. brightness, I guess). I simply turned the knob in one direction, then I got the screen to show true black. The only caveat is that the ranges of the user adjustable brightness and contrast become shorter than before. -- Chih-Hsiang Chou chou@umn-cs.cs.umn.edu Department of Computer Science University of Minnesota