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I cleaned the board another time with more soap and spending more time with the toothbrush, going into each corner and insisting in the ares of the capacitors. Dried it once with compressed air (not too powerful) and I then put it back into IPA for an hour, dried it again over night...

I checked continuity between the SCSI and SWIM chips because I read in this forum that it can be a reason for hang on grey screen. I followed this schematics. SCSI pin 26 and SWIM pin 9 (D2) give me no continuity. I can retrieve the pins in the back of the board, which give me continuity this...

@falen6 I reseated the video ROM. It was not off at all, the lens distortion gave that impression. Regarding cleaning, I did use a toothbrush and the board looks cleaner in real than it is in the picture. The image came out a bit washed out. I will redo a cleaning anyway. That won't hurt...

Thank you for the tips @chiptripper . I cleaned the board with water first (left it for one hour), then dried the board with not too heavy compress air, then put it into IPA for another hour and finally let it fully dry during the night so I think that the board was clean. Unfortunately I still...

Thank you for the help @falen6 ! I will try that cleaning method. I usually keep Acetone away from plastics so I will avoid that in a first step. I have had a tiny solder ball shifting between the legs of the ASC chip while I was cleaning the C7 pad with some de-soldering wick. I don't think I...

I recently got two SE/30s. One had a battery bombed motherboard which had pretty bad corrosion and is out of repair in my opinion. The other motherboard was not touched by corrosion but was showing the Simasimac issue. I am not an expert at soldering but I did a couple of successful recapping...

One more update : After waiting a bit and doing a cold boot, the ugly chime is back again so I don't think I broke anything with my cleaning. After inspecting the board again, I feel that instead of alcohol, it would be some flux that went under that ASC chip when I was soldering C7. Would this...

Here is a picture of the area around the ASC. I am unable to see what can be wrong. I tested each pins and tested for any short between pins and there was none. I tried to do more cleaning of the area with some 95% alcohol. Then, the sound of the chime was getting worse. After trying to power...

I revive this thread as I have a similar issue. I recapped an SE/30 that had the Simasimac screen pattern symptom. I only changed the surface mount caps and also used caps of the same values as the original. When powering on, I can now here a pitched up startup sound and the mac stays on the...

Thank you very much for your reply @Phipli ! Speculative addressing was already off so it didn't help. However, temporarily disabling the backside cache through the same control panel did the trick! It is a bit annoying to do so when I want to print but at least, I know I can keep my upgrade...

Hi, I have a Personal LaserWriter 300 that works perfectly with my PM 9500 when using its original PPC 604 processor. However, when I replace the CPU card with a PowerLogix G3 500MHz upgrade, the computer cannot communicate with the printer anymore. I have the same issue with a Sonnet G4...

Thanks! Glad you like it! :)

Here is more work I have been doing with my 9500. All the 2D drawings, animating and cleaning have been made on the 9500 running system 7. The compositing was made with Blender on my Linux box. I managed to make my cintiq 18SX work on the 9500 so now this old computer has become the drawing...

This guy put the card in an anti-static bag from an old hard drive. http://imgur.com/gallery/bVLBQ

That's very cool! The case looks very clean as well! Well done!

I love it! This was our first family computer back in 1984. I was 5 years old. :)

It seems I found a solution to that so I should be able to use the 1.5GB of RAM of my 9500 with 7.6.  I just replaced the AppleScript and AppleScript lib extensions with those coming from a Mac OS 8.1 install. It looks like it is working well so far. 

Hi Carloselvis, The LC III needs a system enabler to run 7.1. What you need is find a copy of the system 7.1 disk tools that includes this system enabler, just make a floppy with it, boot the mac from it and copy the system enabler to your system folder. You should be able to restart your LC...

It looks like there was only 2 models of 4400 (a 160MHz and a 200MHz) and both had a 603e processor : http://www.everymac.com/systems/apple/powermac/index-powermac.html

For music I would say Sound Jam. It is the ancestor of itunes. You were able to play mp3s and stream web-radios with it. For videos, I would say quicktime.