Macintosh SE/30 Fixing Motherboard Faults
Macintosh SE/30 Fixing Motherboard Faults.
I spent many months (eight) to repair some of these macintosh SE/30 motherboard, like you can see in the gallery.
The flaws that i could find and repair are:
- Some multiplexers (74F253 or like) burned.
- Some Video Ram burned.
- Very Dirty Motherboard.
- Electrolytic capacitors have to be replaced.
- Reseat the RAM and ROM SIMM.
- Some track of the PCB broken or corroded by the acid.
- Replaced the lithium battery with a new one.
- Cold solder joint on chip: RP4/RP5/RP6 – UI2/UI3/UI4 – UJ2/UJ3/UJ4
The flaw that you see in the first picture and that should be the “Jail Bar Pattern” or “Smile Mac in Jail”, in this case is not been so. For this reason i spent a long time to find the fault.
However, i recovered 3 motherboards and I consider myself quite satisfied.
source: Repair Macintosh SE/30 68kmla.org #1 68kmla.org #2
Categories: Apple, Gallery, Retro Computers and other stuff...
Hello,
i would like to repair a SE30, and the first problem is that: I have the chip 341-650-A AMI 9005 MBP with two broken pins :(:(
Do you think I can find the part to replace it ?
Thank you very much!
R.
Hello I own a working Mac SE/30 which was in storage for a couple years. I just pulled it out and booted up and it’s making working noises but there’s no start up chime and the screen stays black except for every once in a while there’s flashes of light like a birthday I’m starting the middle with streaks horizontal. It’s always worked perfectly so I went online and saw some articles about corroding capacitors and then found your article. Have you ever just clean the motherboard and have it work? Or have you always had to fix the capacitors and other components?
This was the article about the corroded capacitors
http://pc-restorer.com/repairing-a-macintosh-se30-with-no-sound/
@Lantz Newberry
You must thoroughly clean the motherboard and replace all electrolytic capacitors.
Best regards.