Hi!
I picked up my first compact Mac - an SE SuperDrive with 1MB RAM.
It booted fine, but the display brightness was unstable (dimmed in unison with hard drive access) and the horizontal screen size would jump by 5mm or so every now and then.
So I ordered cap kits from Console5 for the PSU and Analog board. I finished the recap of both earlier - everything went smoothly and I triple checked all values/polarities, etc.
At the same time, I swapped the 4x256K SIMMS with 4x1MB modules, and adjusted the jumper.
Now, when powering on I immediately see a pattern of thick stripes. The floppy drive does do a few accesses, but no chime or boot.
I swapped back to the original SIMMs and jumper config, but the problem persists (although symptoms are different)
I’ve attached two photos: the one with vertical stripes is with the original RAM and jumper setting. The one with horizontal stripes is with the 4x1MB SIMMs and the adjusted jumper.
I’ve also reseated all socketed chips and cleaned the SIMM slots with isopropyl and a soft brush to try to fix this. No obvious physical problems with either my soldering or the logic board sockets that I can see.
Any advice on what to check would be greatly appreciated
I picked up my first compact Mac - an SE SuperDrive with 1MB RAM.
It booted fine, but the display brightness was unstable (dimmed in unison with hard drive access) and the horizontal screen size would jump by 5mm or so every now and then.
So I ordered cap kits from Console5 for the PSU and Analog board. I finished the recap of both earlier - everything went smoothly and I triple checked all values/polarities, etc.
At the same time, I swapped the 4x256K SIMMS with 4x1MB modules, and adjusted the jumper.
Now, when powering on I immediately see a pattern of thick stripes. The floppy drive does do a few accesses, but no chime or boot.
I swapped back to the original SIMMs and jumper config, but the problem persists (although symptoms are different)
I’ve attached two photos: the one with vertical stripes is with the original RAM and jumper setting. The one with horizontal stripes is with the 4x1MB SIMMs and the adjusted jumper.
I’ve also reseated all socketed chips and cleaned the SIMM slots with isopropyl and a soft brush to try to fix this. No obvious physical problems with either my soldering or the logic board sockets that I can see.
Any advice on what to check would be greatly appreciated