I have changed the memory & it now works - although the screen is intermintment, sometimes it shows the strange pattern, other times it's fine.
I have tried two different motherboards & ths same process occurs with both. I cannot explain it. Although thanks for your help. Many Thanks Geraint Searle ----- Original Message ----- From: "Antonio Rodr�guez" <[EMAIL PROTECTED]> To: "Compact Macs" <[EMAIL PROTECTED]> Sent: Sunday, August 22, 2004 4:38 PM Subject: Re: Pattern Screen, On switching a SE/30 on > Here's a higher resolution picture of the screen for those interested: > > http://ajgelado.eresmas.net/shots/pict1813.jpg > > Looking at this picture, I may say that it's a RAM-related problem, because > of the repetitive pattern. Any other ideas? > > Greetings, > > Antonio Rodr�guez (Grijan) > <ftp://grijan.cjb.net:21000/> > > Antonio Rodr�guez ha escrito: > > > The picture (http://ajgelado.eresmas.net/shots/pict1814.jpg) shows a > > series of ordered horizontal scan lines of regular width, so I think > > the analogue board (with its horizontal and vertical sweep circuits) > > is working correctly. It must be a logic board problem. I'd try the > > standard procedure: to take out of the logic board all the SIMMs (both > > RAM and ROM, if it's present), cleaning its edges with a pencil > > erarser and reseating them. If you have known-good RAM SIMMs at hand, > > you could also try them. > > > > I'd also try to power on the SE/30 with both the hard drive and the > > disk drive unconnected from both the logic board and the power. If you > > get a bogn and then a flashing disk, you know that the problem is in > > one of the drives (or their controllers). > > > > If nothing solve the problem, I'd try to adjust the analogue board's > > voltage regulator. If you need further instructions on how to do this, > > I can give them to you. > > > > In the worst case, there's a (small) posibility that you have touched > > the logic board while being charged with static electricity, and that > > have "fried" one or more chips. In that case, the only possible fix > > would be to get a replacement motherboard. > > > > Good luck! > > > > Greetings, > > > > Antonio Rodr�guez (Grijan) > > <ftp://grijan.cjb.net:21000/> > > > > -- > Compact Macs is sponsored by <http://lowendmac.com/>. > > Support Low End Mac <http://lowendmac.com/lists/support.html> > > Compact Macs list info: <http://lowendmac.com/lists/compact.shtml> > --> AOL users, remove "mailto:"; > Send list messages to: <mailto:[EMAIL PROTECTED]> > To unsubscribe, email: <mailto:[EMAIL PROTECTED]> > For digest mode, email: <mailto:[EMAIL PROTECTED]> > Subscription questions: <mailto:[EMAIL PROTECTED]> > Archive:<http://www.mail-archive.com/compact.macs%40mail.maclaunch.com/> > > > --------------------------------------------------------------- > >The Think Different Store > http://www.ThinkDifferentStore.com > --------------------------------------------------------------- > -- Compact Macs is sponsored by <http://lowendmac.com/>. Support Low End Mac <http://lowendmac.com/lists/support.html> Compact Macs list info: <http://lowendmac.com/lists/compact.shtml> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> Archive:<http://www.mail-archive.com/compact.macs%40mail.maclaunch.com/> --------------------------------------------------------------- >The Think Different Store http://www.ThinkDifferentStore.com ---------------------------------------------------------------
