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So while restoring my 840AV, I’ve found that the PSU is dead or at least nearly dead. It’s a Delta SMP-220DB. The symptoms are that it will click on, then click off again. Sometimes, it stays on a bit longer, but it seems to be struggling from the way the fan sounds. It does the same with two...

I've acquired this non-working Radius PrecisionColor 24X (quite a nice card as I understand), which I'm interested in repairing. Running it in a Macintosh IIci, the current symptoms are that there's no output, and it's not listed in TattleTech either – it's invisible to the system. I guess that...

So I’ve been kind of toying with the idea of creating YouTube content for a while. Here’s my first properly edited video, perhaps some of you will enjoy it.

I've started sketching out schematics for my PowerBook 180 CPU daughtercard, which I'll put up on GitHub when done. I think it would be really nice for us to have these to help with troubleshooting and to learn more about this series of machine. Just wanted to check that none currently exist...

This week I've been getting my PowerBook 1400c to work with a 166MHz CPU card. To do this, I installed newer ROMs from a donor 166 board, and this has been successful. While I had the 2 revisions of ROM chips off the boards, I dumped their contents with my T48 programmer, and have attached here...

So it looks like I have a manual inject floppy in my newly acquired 840AV, but an auto-inject bezel because I can't push disks in without using a pointy object. I have a spare working MP-F75W but I'm guessing I won't be able to mount it without the detachable metal drive casing/shield that was...

I've just obtained one of these chips. All indications are - particularly the film of dirt - that it's a genuine part. I'm going to swap it into one of my 68LC040 processor cards later and hopefully, gain an FPU. This will go in my PB 540c if successful. I'm dead curious as to what the donor...

I have a PowerBook 180c daughtercard that I want to use with a motherboard that came with a 180. I see that the m/bd has the same p/n so I assumed this would be fine. But on closer inspection, I see this: Compare to 180c version found on the web: Has anyone tried interchanging these?

So to kick off this new thread, I've had a bit of luck on a 820-3330-B logic board (for a mid-2012 MacBook Pro 15") that I bought on eBay for £22. It was advertised as 'a faulty motherboard that doesnt appear to be powering on', so I thought I'd have a go at repairing it – with the intention of...

I'm servicing a Dyna Comp DCF 353 and the two RIFA caps are missing: I've searched for values for these on 68kmla and elsewhere, but have come up short. Does the PSU need these to be there to operate? And if so, does anyone know what values these would be?

I'm having the following issue, very occasionally, with my SE/30. My hunch is that the PSU needs recapping, or perhaps there is a dry joint. Any thoughts?

This guide shows the process for a PowerBook 160/165/180, but it should be similar for a 140/145/170. The main difference is that the earlier PowerBooks have a narrower 50(?)-pin connector rather than 72-pin on the later ones. I carried out this repair on two of my interconnect boards after...

Under System 7.5.5, Desktop Patterns will only offer 8x8 sized patterns on a black and white compact mac. Is there a way to trick it into allowing me to set the 64x64 patterns? I have tried using Wish I Were… to change the machine ID to a Macintosh CX, but it doesn’t work. This photo shows the...

I have a large pile of PSRAM chips taken from PowerBook 165/180 RAM cards and CPU daughtercards. I am trying (and struggling) to assemble some 10MB cards using the empty pads on my 4MB RAM cards. I think some of these chips are faulty. Is there any way to test these chips other than soldering...

Spinning off from @bigmessowires thread about DIP switch adapters, I am trying to get my 15AV to work with my Macintosh IIci. According to the service manual that's freely available online, this monitor should work with any II-series Macintosh without an adapter. @Phipli, I believe you also...

I’m trying to figure out why System 7.x doesn’t render the title bar of open windows with nice greyscale shading on my PB165 when set to 16 greys or 16 colours. Compare these two images: The second picture is booted off the disk tools floppy but on the same machine. The first picture is a...

This is a bizarre one. I can’t get my newly flashed Radeon 7000 PCI to work in my beige G3 when I have a Yikes G4 ZIF installed. The problem only occurs with the ATi extensions installed. It locks up when the CPU Director extension tries to enable the cache. If I disable the CPU Director...

I got hold of a G4/400 from a Yikes! G4 which I’ve installed in my Beige G3. Works great under OS 9, but I can’t get the L2 cache enabled under Mac OS X 10.4.11. CPU Director 2.3b6 fails to install, and XPostFacto’s L2 cache option causes the Mac to hang on boot. What is the correct software to...

Is any 65C22 PLCC44 chip usable as a replacement for the SE/30 VIAs, such as this one?… https://www.ebay.co.uk/itm/165422207640?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=sG19Fg44Sb-&sssrc=2349624&ssuid=ROvgIzoeSIK&var=&widget_ver=artemis&media=COPY

I have the following graphical issue with one of my Bolle builds - vertical bands of data corruption. It takes quite a while to show up. In this case, I’ve had the setup running for a few days. My guess is that it’s a VRAM issue, either a bad chip or a marginal solder joint. Is it possible to...