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Tum te tum... Edit : an extra fold tab at the top is likely needed for rigidity - it will be harder to include if you don't have the right tools, but worth it. Sorry the folds don't look like proper sheet metal folds, I haven't used this cad software in 10 years and never have much.

Yes, it is a mess there isn't it (eBay photo for reference) Options I'd consider... Unlikely to be enough room, but you have a little flexibility to move the VGA connector forwards and backwards, even left to right, to get small pads between the rows and columns on the HDI45 footprint. Not...

https://elephantandchicken.co.uk/stuffandnonsense/?p=1386 I know how that feels too. This isn't the worst one that I've worked on, just the only one I've documented. Wise words. They're horrible to read and do contain errors. I have a dead and a mostly working cx in the house, shout if you're...

I'm not great at the G4 era, I sort of jumped over it mostly other than a Mac Mini at the time - it aligns with when I left home and stopped having as much exposure to macs. I have a couple of G4s now, but have fitted DVI capable cards to them, I don't have any cinema displays anyway. Not sure...

They're not... I potentially worked out what they possibly might be from an old apple engineering doc that listed interfaces including one in that era that was never used... I can go and dig again. I think I was talking about it with someone on discord so might have the chat history to save me...

Also, use a scalpel to ping (gently nudge) each pin on QFP chips to check that there aren't any dry contacts. If they wiggle, resolder them. That's where a lot of issues can be found. Especially on plug in cards, but on corrosion damaged boards too. The pain is that if you put a probe on the...

Sorry, just realised I did a thing I do. I answered your question and didn't think about the context. It is very unlikely to be the CPU. It almost absolutely never is. I would still be checking traces and even perhaps check the ROM contents are valid.

Or can't talk to the VIA I guess, but less likely. Yeah, use any speed 030. As long as it isn't an EC model.

OK, that means the CPU isn't running code from the ROM, that is a big clue. Rifa shouldn't have done any harm to the logic board. They generally either cause no actual visible functional change or blow the fuse in the power plug.

No problem, I wasn't attacking I'm just... I tend to clarify rather than leave stuff, a bad habit from a character flaw and critically precise working environment where misunderstandings cause major problems. No offense meant. I was sharing thoughts because it is something I've considered doing...

It will only switch once, so a meter would be fine for checking it if you can get a safe connection. There will be a test point I'd suspect. I'll see if I can find what it is for you... (I'll edit it in if I find it, if I don't, assume I couldn't or got distracted by a passing bee).

I broke out the thermal camera and it looks like the head driver IC is getting warmer than I would expect. Not super hot... but it heats up instantly and it doesn't in older models I have (although it is a different part). My next step would be to try swapping it out, but I don't have another...

Nah, you don't need the mounting point. Without the huge adapter you'll be putting less strain on the connector than the stock design which was mostly ok with just the solder mountings. Keep it small, keep it cheap. Ok, but just to warn you, that isn't what logic means in electronics, or IC...

Ah, no, you don't need anything other than some traces and a single diode to adapt from PowerMac video to VGA. The adapters with switches are only needed for older macs, and even they just have like, two diodes in them, unless you're messing with sync and auto detection. Here is the required...

That's good, if the opening is flush with the board then it is even easier. I don't quite know what chips you're talking about though, isn't it just the HDI-45 connector going on between the board edge and the connector pins?

No need to drill holes in the case. An L-shaped bracket with two right angle triangles would provide plenty of support. You could make the whole thing out of PCB. As mentioned, there are four ground tabs already there for mechanical support (they're already used as such by the existing...

It would be easier to desolder the connector from the logic board and replaced it with an L-shaped bracket that presented a standard apple or VGA port on the back. Way easier to pick up the contacts on the logic board than at the connector end.

Page 282 onwards here might help : https://vintageapple.org/inside_o/pdf/Guide_to_Macintosh_Family_Hardware_2nd_Edition_1990.pdf#page=282 I suspect address lines A0 and A1 aren't connected because the ROM is 32bit and the addresses are in bytes? Or am I being daft? So basically, you don't need...

I wrote a little program that extracts styled text resources from a file (in this case application) converts mac encoded characters, changes formatting to html and spits out a file for each resource. I used this to export the 300+ pages of the in application manual for Control Lab and LOGO...

Ah sorry, just noticed the peripheral one has subcategories - I opened every top level in a new tab and missed that that one was one of those.