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I bought this small heatsink/fan combo for my IIsi (Amazon link), it is designed for a Raspberry Pi. I haven't installed it yet, but it looks like it might be a good solution.

I wonder how often modern 1/2 AA batteries need to be changed to be safe.

In case anyone runs across this old thread, here is a link to an article on the MonsterMac from the May 1986 issue of Apple User (link), page 16. It discusses the installation process, starting with a 128k -> 512k RAM upgrade, and then adding the MonsterMac board to bring the total to 2mb.

I found this article on the MonsterMac upgrade in the May 1986 issue of Apple User (link), page 16. I always think it's interesting to read old articles about products that were new at the time.

You're sure the coin cell battery is good, and the installation is sound, getting power to the right places?

I've never been able to bring myself to use the twist method, though many people swear by it, with few horror stories. If I'm not using hot air I generally use a pair of side cutters to cut the can off the base, as close to the base as I can get. I do this while applying downward pressure on the...

Everybody has done it, usually more than once. It's part of the hobby, and especially part of learning. There aren't very many ways to damage one of these boards that can't be fixed.

Nope, it is this. Here is my writeup on my build.

Now it's time to put your soldering skills to the test and build one of Bolle's reproduction Performer '030 accelerators! Congrats on getting things (mostly) working.

What happens if you just power it on?

Those are the ones I use, the red stripe is pretty badass. Original look, but with a little edge. 😂

Keep us updated in the IIsi. As the owner of two, and repairer of both, I'm always interest in people's IIsi challenges. Hopefully a simple recap will bring yours back to life, though in general it seems IIsi's take a bit more than that.

I'm not aware of any sort of combination video/Ethernet card. There were some dual-PDS risers that would let you run two PDS cards, but I don't think there was a version with dual NuBus or PDS and NuBus. The newest BlueSCSI has WiFi, that would be an option to get your machine connected without...

I'm keeping my eye out for some sort of accelerated 24 bit card. I currently have an 8*24 (not GC). It works fine, but the redraw is slow in 24 bit mode. 8*24 cards come up for sale pretty often on eBay for not a lot of money, but I'd hold out for something better if you are in the market for a...

What's going on with your SE/30 board?

Good call on the 4mb, especially if you are using a video card so you don't need to worry about the shared VRAM. I had forgotten about this thread and should have updated. I finally got my IIsi working this morning, the 8x chips harvested from 256kb SIMMs worked. I installed them a year ago and...

Yeah, when I was working on my board today I found a few errant solder balls from the paste that had not melted. It would not be good if those migrated to the wrong spot.

Nice write-up. I did not upgrade my board to 4mb, but I did replace the onboard RAM due to a faulty chip(s). I also used solder paste and would recommend it as a starting point. The reason I replaced the RAM was due to a suspected RAM issue resulting in a death chime. I replaced the ALS245s and...

Got it, consider my prior suggestion fully withdrawn. 🙂

Fixed! I took the board out today to check continuity of the traces going on the ROMs, since I overlooked this previously and only checked the ROM SIMM. While I was in there, I decided to check the RAM chips for bridged pins and continuity to the pads. I found two pins that did not have...