mmt@client2.DRETOR.UUCP (Martin Taylor) (07/30/90)
In a message I did not keep, and so can't credit, someone mentioned that classic Macs (128 and 512) tended to have certain connections on the analogue board come unsoldered. I have been having problems of slowly growing severity for some months with black strips flashing across the screen, sometimes leading to complete blackouts, which were correctable by tapping the case of the Mac (at first). They were worse in heat. When I opened the Mac, I was able to trace the problem apparently to a bad connection somewhere in the cable connecting the analogue board to the digital board. Soldering the pins on the analogue board plug (in addition to the conenctions around the area of the flyback transformer recommended in the missing message) seems to have fixed the problem. During the tracing procedure, I found the pins of the CRT severely tarnished. In fact one of them looked more like an antique Roman bronze than an electrical contact. I cleaned them with fine emery cloth, and that seemed to help somewhat as well. There is another problem that might be hardware and might be software, that I am not sure I have fixed: My Mac has a Dove 548S (2 Meg + SCSI) expansion, and I have a Jasmine DD80. Occasionally, the Mac will lock up, sometimes allowing the cursor to move (usually), but sometimes not. This seems to happen mainly iHypercard (1.2.5 with System 6.0.4), but I found it also happening when I opened Nisus 2.11 from a document (Nisus received three days ago). In a fit of suspicion, I removed the init XPRAM 512KE, and it hasn't happened since. Is there any reason to believe there is a bad interaction between this init and HyperCard or Nisus? I have not run in this mode long enough to be sure the problem is really fixed, because in HyperCard I might get one hang in a few days. -- Martin Taylor (mmt@ben.dciem.dnd.ca ...!uunet!dciem!mmt) (416) 635-2048 There is no legal canon prohibiting the application of common sense (Judge James Fontana, July 1990, on staying the prosecution of a case)