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From: pizza@leland.Stanford.EDU (Pete Richards)
Newsgroups: comp.sys.mac.hardware
Subject: Re: SE/30 screen flickers/no it doesn't/yes it does/...
Message-ID: <1991Jun10.214453.11799@leland.Stanford.EDU>
Date: 10 Jun 91 21:44:53 GMT
References: <12163@skye.cs.ed.ac.uk> <1991Jun8.223327.25416@spool.cs.wisc.edu> <1991Jun10.194731.5008@mmm.serc.3m.com>
Organization: AIR, Stanford University
Lines: 52

In article <1991Jun10.194731.5008@mmm.serc.3m.com> pejacoby@mmm.serc.3m.com (Paul E. Jacoby) writes:
>In article <1991Jun8.223327.25416@spool.cs.wisc.edu> elliott@veronica.cs.wisc.edu (James Elliott) writes:
>>In <12163@skye.cs.ed.ac.uk> nick@cs.ed.ac.uk (Nick Rothwell) writes:
>>
>>>Any other SE/30 owners had the following problem? A sporadic flickering/jumping
>>>of the screen: the top and bottom few pixel rows of the screen suddenly
>>>stretch, and the stretched regions drift inward toward the centre and then
>>>out again.
>>
>>Yes, actually, I've begun to get concerned about this problem myslf.
>>Strangely enough, after the monitor has been on for about half an hour
>>the problem stops. I don't know whether it's the fault of my external
>
>Oh, this is weird, too weird.  I am just now starting to have some
>problems with MY SE/30 video setup!  It can't be the Ides of March;
>after all, it's June... :-)
>
>  I have an SE/30 with a RasterOps 264/30 24-bit video card.  I just
>  recently swapped my internal 40 meg Sony drive out for a Quantum PRO
>  105 megger.  Now, on occassion, when starting the machine up, it goes
>  into a try-to-boot/reboot/try-to-boot cycle.  When this happens, the
>  RasterOps logo comes up on my external monitor, accompanied by a lot
>  of BLUE NOISE--horizontal blue bars at random locations all over the
>  screen.  If I let the machine sit, it will do the reboot-thing for
>  quite a while.  Each time, the RasterOps card repaints the whole logo,
>  and the blue bars are there.
>
>  Eventually, I get tired of it and hit the Programmers switch.  Sad Mac! Code
>  000F 0013 or something similar.  Hitting the Reset switch makes the
>  machine boot properly!  After getting a good boot from the reset
>  switch, all is well, and life is happy.
>
>  Note that often I will boot just fine the first time; no delays, no
>  reboot, no blue bars on the monitor.  Any ideas?
>
>  SE/30, System 7.0, RasterOps 264/30 (rom v1.3), Quantum PRO 105 (can't
>  recall the ROM on it; I think "A.5"?), external Conner 105, Seiko
>  CM1445C monitor.
>
>
>-- 
>| Paul E. Jacoby, 3M Company, 3M Center, 235-3F-27                   |
>| Maplewood, MN   55144-1000     .-----------------------------------|
>| => pejacoby@3m.com             |     I am _not_ the editor of      |
>|                 (612) 737-3211 |         the Radio Times.          |

Regarding the stretching of pixels at the top and bottom of the screen:
I had a similar problem last year on an old Mac 512--The bottom and top maybe
1/4 inch of the screen scooted in and out toward the center.  It finally got
so bad I took it in for professional help--The power supply needed to be re-
placed.  Whether or not the power supply problem is the same in an SE30 I can't
say but that may be your problem.