mkentley@wpi.wpi.edu (Michael J Kentley) (02/15/89)
Lately one of my ST's has been acting up and I wonder if anyone out there has had the same problem that I am having with it. First, its a 520 upgraded to a meg. The problem is, that after I've been using it for an hour or so the beast just seems to keel over. I will get either 2 or 4 bombs and the system freezes. When I reboot, just before the desktop should come up, 2 or 4 bombs flash on the screen, the screen boes black, then it it tries to reboot. This happens over and over until I shut the machine off. If I leave it alone for a few hours, and then turn it back on, it acts as if nothing was wrong, for about an hour, then the whole thing starts over again. Does anyone have a clue as to what might be causing this??? My BBS is running on only .5 meg till I get this fixed. Thanks for the help.
mkentley@ame ji.wpi.edu (Michael J Kentley) (02/15/89)
Lately one of my ST's has been acting up and I wonder if anyone out there has had the same problem that I am havtng with it. First, its a 520 upgraded to a meg. The problem is, that after I've been using it for Bn hour or so the beast just seems to keel over. I will get either 2 or 4 bombs and the system freezes. When I reboot, just before the desktop should come up, 2 or 4 bombs flash onisius fscreen, the screen boes black, then it it tries to reboot. This happens over and over until I shutwate machine off. If I leave it alone for a few hours, and chen turn it back on, it acts as if nothing was wrong, for Bbout an hour, then the whole thing starts over again. Does anyone have a clue as to what might be causing this??? My BBS is running on only .5 meg till I get this fixed. Thanks for th
IA0@PSUVM.BITNET (02/16/89)
I also have a broken 520 STFm, which I was trying to upgrade to 2.5Mb. The upgrade unit did not fit well in the case, so I was trying to adjust the template which pushes into the MMU chip, then powering up and counting memory. At one point, the system failed to boot. So I removed the new ram. It still won't boot. The upgrade consisted of a video piggy back card and the MMU template. The current symptoms: no video, no disk-access light, but the disk head does move a bit when powered up, and I can hear the video whine. I suspect problems with either the MMU or video chips, since they are the ones that get moved/plugged-into. Any ideas? I'm dead in the water at the moment. David Huenemoerder PennState Dept. of Astronomy internet: dph@astro.psu.edu (128.118.30.150) bitnet: ia0@psuvm
hedger@inmet (02/17/89)
I'd check for a weak solder joint or bad connection especially around the upgrade. If it's the plug in type, I'd open up the ST and give the plug in chips a good push to make sure they are tight. ===================================================================== | | | Keith Hedger : {...!}uunet!inmet!hedger hedger@inmet.inmet.com | | | =====================================================================
mc2818@uxf.cso.uiuc.edu (02/20/89)
I believe the problem is with the video chip pins. I tried upgrading my ST to one meg, and when it didn't work, I removed everything, put it all back and it didn't work! Turns out that the pins on the video chip weren't making good contact. So, bend the pins out a bit and reinsert it. Hope it helps. -Mike
michaels@tekigm2.MEN.TEK.COM (Michael Schaeffer) (02/24/89)
In article <71682IA0@PSUVM> IA0@PSUVM.BITNET writes: >I also have a broken 520 STFm, which I was trying to upgrade to 2.5Mb. The Same story here: 520 ST, EZRAM-II upgrade, bombed out of a program repeatedly one evening this week, will not boot properly since (say twenty cycles through the on-off and/or reset caused it to lighten the screen, read drive A, bring-up the desktop with a frozen mouse, die with two black bombs, and four striped bombs; next reset, a constant row of black bombs. To the net - can someone post a listing of bomb pattern to error code conversions please ... monthly! To Atari - could you please never introduce a computer manual on the market again without including an error code listing! |\ I am Michael Schaeffer |\ |\ | |\ I talk 206.253.5395 | | <> | > > > > 11001011 00101101 I read michaels@tekigm2 <> <> <>
kirkenda@psu-cs.UUCP (Steve Kirkendall) (02/25/89)
In article <71682IA0@PSUVM> IA0@PSUVM.BITNET writes: >I also have a broken 520 STFm, which I was trying to upgrade to 2.5Mb. The >upgrade unit did not fit well in the case, so I was trying to adjust the >template which pushes into the MMU chip, then powering up and counting memory. >At one point, the system failed to boot. So I removed the new ram. It still >won't boot. This is just a guess, but... The "template" which you insert between the MMU chip and its socket probably bent some of the socket's connectors, so that they no longer make a reliable connection to the chip. If this really is your problem, you can fix it by taking a piece of wire, bending it to make a hook, and using the hook to pull the connectors back into the proper shape. (I had a similar problem once, and that fixed it.) -- "If I seem insensitive to what you're going through, keep in mind that's the way I am." -- Mr. Spock