You have become one of my favorite youtube channel content creators. Your personality and presentation are superb. You communicate clearly and concisely and your passion for your work is second to none. I also love that you deal with "vintage" hardware and you make them come back to life! Adrian, please keep up the great work and I wish you the best. I own my original C64 bought new in the early 1980's that I bought to get me through college term papers and I could not have done as well as I did without it. Kudos for all you do!
Ah, Adrian, you have learned the very important lesson in debugging-QUESTION EVERYTHING! ;-) Love it. Keep up the great work. I especially love that you kept at it until you found the root cause. I can’t tell you how many nights I’ve stayed up doing exactly the same thing. Every once in a while, you’ll go to bed out of frustration, get a terrible night’s sleep, only to wake up and go, “duh”, and the problem will be solved instantly… It’s how the mind works… Don’t question it-just go with it. It’s a beautiful thing…
handful of semi useful things to know - the ROMs in Macintoshes use the standard 27XX ROM pinout, so you can easily replace the ROMs with 27C512 EEPROMs if you wish. Additionally, an 800K drive *will* work with a Macintosh 128/512 with the original 64K ROMs. It will only be able to boot from 400K MFS disks, but, once booted, the original ROMs can read 800K formatted MFS (but not HFS formatted) disks. Try it with a floppy Emu and a 128k!
25:35 its almost like those connectors became sacrificial anode and stopped the rest of the thing from rusting, it probably wasn't soaked in water too, just the outside of the chassis.
The power supply issue is one of them prime reasons why it's always a good idea to make sure everything is working before doing diagnostics, just as you'd point out when doing C64 repairathons, chasing a fault that isn't actually on a piece of hardware is such a pain to deal with, and the facepalm of discovery often hurts... :P
Thanks for another awesome video Adrian, Mac videos always remind me of high school even though those were Classics I used. I remember seeing the older Plus models in a storage room in the back. I'm sure if they could feel they would show a sad Mac icon being forgotten in the back like that just like this failed Mac. Electronics is surprisingly robust, but it isn't invincible. Enough bad treatment and recovery becomes a chore. It's rarely impossible, but the level of difficulty increases with each component that needs replacing or repairs.
ok the 43:00 moment is great and so relatable :D as is the later addendum, finding your own mistake, thinking that's it, it isn't, then finding another mistake that's the actual problem
The white residue is ionic contamination. According to Chemtronics, "if not completely removed during cleaning, these ions can establish a continuing corrosion cycle, producing more lead chloride and lead carbonate (white residue) and hydrochloric acid, which will attack the copper in the board laminate." You get it from old flux used back in the day if you try to wash it with hard water. They sell a special solvent just for cleaning this white residue (as well as old, crusty or sticky, hard to remove flux.)
Regular old vinegar is good for removing hard water residue. It's basically calcium and other minerals, and citric acid works a charm on it. Vinegar is a weak solution of citric acid, and is a gentle way to clean hard water residue.
Hi Adrian, always enjoy the video's. Before all the work removing the mods for the ram expansion, can you swap the two boards over too see if the working ram board works on the corroded mother board then if the corroded ram board works on the working motherboard, to see if it's the expansion or motherboard causing the fault.
Adrian, I have a bottle of Deoxit 100L (different from the spray you use) that I want to send you. It's so much better. Also, You might want to try some Rustoleum Rust dissolver gel on those d sub jacks. The dissolver gel contains phosphoric acid (like in coca-cola) that converts iron oxide into iron phosphate which is easily removed from the metal. I have used it on some rusty DIP chips with success.
20:47 Looks like the board was designed or manufactured in Seattle, Washington. Just to the right of the "Inc" part of the company name, between the P and C, is the top of the Space Needle.
Hi love your videos. I have an extra mac classic CRT tube and that looked great but the damage to the classic motherboard was very bad, unrepairable. If you are looking for a tube, I am looking for a working keyboard for an Atari 800XL may be do a trade?
Enjoy all your content. With how easy it was to remove the ram expansion board I was surprised that you didn't try swapping the ram boards to see if the fault was on the ram boar or motherboard or both.
Hilarious ending to this video. You couldn't let go of the problem this late at night. Hahaha, so funny 😂 Maybe that missing connector pin from your Pico is still somewhere in another Apple motherboard.
My family had a 512Ke with an HD20 and it absolutely worked, although most of the time we used the floppy style HD20 with Mac Plus (and yes I know it would have been much better to use a SCSI drive with the Plus).
Not to beat a dead horse...You could try the RAN upgrade card from the non-working board on the one that actually boots. That would at least tell you whether it works or not. The connectors are already there. It wouldn't be too hard.
I have that same power supply solution for an SE/30 board in a custom case I made for it. I didn't butcher an SE/30, I got the board only that had been "worked on" that I had to actually repair. I don't have any Macintosh chassis, my classic Mac is a iici that I use along with my iigs, so I just designed a case similar to the iigs and printed/fabricated everything needed. The funny thing is, with color through a card along with all the other possible upgrades I could manage to get it's actually a surprisingly strong machine (or maybe not surprisingly, for me that has only used a couple original Macs and a base model Classic it feels like a whole different experience to say the least).
*Sigh...* Adrian, Adrian, Adrian... OK, just a few things about the Mac and even Lisa (Mac XL). Note: Anything mentioning the Mac 128/512K also includes the Lasa (Mac XL) 1) The Mac 128 CAN accept 800K Double Sided Drives. and Boot from it. The Issues are: A) ROMs The non Enhanced ROMs used in the 12*/512K Maca can only use System 1 to System 3.2/Finder 1.1 to Finder 4.1. It can not use System 4.2 to System 6.0.8 / Finfder 4.5 to Finder 6.1.8... BEcause ... B) You have two flie formats to deal with: Macintosh File System (MFS) and Hieracrhical (sic?) File System. The MFS id a flat file system like on the old 8-bit systems with "fake" directories. HFS has true sub director trees. 2) In the past people tried to mix and match format with utter failure. MFS is for the older System 1.0 to System 3.5, HFS is for System 4.2 to system 6.08. System 7 uses HFS+ which is still compatible to the with HFS and Bootable on the Mac with newer ROMS. Putting on an older system onto a newer format, you just get a disk that will attempt to boot and then crash. Same if you put the newer system onto an MFS formatted sik, it will attempt to boot and then crash. Also, an older system disk (MFS) will not be abe to read the file content of the HSF disk. The newer HSF system can read an MFS Disk but can not write to it. If it does, it will scramble the directory. The Newer ROMs found on the 512Ke and Plus will read, boot and write from a older MFS System Disk so there is some compatibility there with older apps and files. HFS can ready MFS floppies but can not write to them or (again) it will screw up the directory. But you can read from a MFS Disk and copy it to a HFS Disk. That is a saving grace os some sort... The old days of the B/W Macs were basically the Wild Wild West days of Macintosh. Even back in the early 1990s, Jobs ended use of the Floppy port on Color Mas, he told parts makers to stop making the DB-19, used in the floppy Port. Some did, others didn't. making the part obtainable but expensive. My ol friend and Mentor (RIP) Dr. Hank Levinson , figured out that you can take a Serial Port DB-25 and cut it down and shape it into a DB-19. It took a lot of work but it was doable. You an even cut the hood into shape an d lightly solder the pieces together. A lot of his repairs and modifications are on the Apple II Newsgroups, which aere google searchable. So for us, at the time he made DB-19s because they are also used on the newer Apple IIe/c/gs as well as the Macs. And just remember one thing, Adrian... What ever gets you through the night, is alright.
Great stuff Adrian, another very enjoyable video, but careful with all this classic Mac stuff you're going to make me want to get one too!😂 Love the after hours vibe and the never ending addendums, now go to bed!
It really bugged me that you didn't try to diagnose that logic board without the RAM extension board plugged in. Presumably if you populate the LS244 sockets on the logic board it will work just fine without the extension board.
I wonder if the ports on the first motherboard could be salvaged using something like Evapo-Rust? I've had pretty good results with it restoring tools, maybe it might work for the connectors?
Just an idea, but since you don't have the original case and screen, what if you made a portable/luggable or custom form-factor out of it? Cram the motherboard, PicoPSU, RGB2HDMI, and an LCD into another case from something with a dead LCD/motherboard. Maybe even a modern style iMac, the 2010 era iMacs are easy to get for cheap.
Heh it's just funny to think about my always solid and worked last time I used it PSU had an issue -- well it was just a bad connection. But yeah with the drives, I didn't spend long before I figured out it was the missing rail. No drives were harmed in the making of this :-)
It's all good. You figured it out and that odd issue with the 1 unsoldered pin is certainly easily missed. I can't tell you how many times I've done similar too. Wasting time on a what I am certain is a more complicated issue, only to discover it was something super simple (maybe obvious to others) that I totally overlooked.
Hi Adrian, I would like to see a Video where you put this motherboard in a 3D-printed classic Macintosh-Case with a LCD-Screen and maybe modern keyboard and mouse attached to it...???? Please....
You have to remove the corrosion. You can't do that with water. Many products out there. Even things like deoxit have acid as an ingredient.. You can totally remove that corrosion. Liquid Tin - I used to pour this over my freshly done circuit boards. You can do that after removing the corrosion. But you have to remove the corrosion first.
It happens when you work after midnight that some silly mistakes happen, the other day my monitor started going into a black screen. So I unplugged it and reached for the spray can of contact cleaner, but because I was a bit tired I didn't quite read what was written on the can. It didn't say contact cleaner but contact glue. #&%!. Big error 40. I wouldn't recommend it, but there hasn't been a loose connection since. In Danish, error 40 means human error, the error is 40 cm (16 inches) from the screen. Are you also saying "error 16"?
Now I was thinking, if you don't have a case the motherboard could go in, maybe build a Mega-mac with an enlarged case that *looks* like a classic mac, but has multiple drives and an LCD screen. Yeah, I know, that's more like something Sean would do over on ActionRetro.
why not take the memory expansion from the known working 128k board and try on the 512k board? or try the questionable memory board on the known working 128k motherboard?
![Adrian's Digital Basement ][](http://yt3.ggpht.com/ytc/AIdro_k7CrQRe71qN6c0Ua7A1P_I8KkxjqLa70u0zYeCvdvnKw=s48-c-k-c0x00ffffff-no-rj)
Sometimes you can't go to bed because you "just gotta know!"
Adrian’s Digital Dungeon! Would make a great 8-bit adventure game.
As long as it ends with an 8bit dance party
OMG. I love that you don't hide mistakes. It makes me feel more human when I do the same...
Also other people can learn for mistakes that other made and what not to do.
You have become one of my favorite youtube channel content creators. Your personality and presentation are superb. You communicate clearly and concisely and your passion for your work is second to none. I also love that you deal with "vintage" hardware and you make them come back to life! Adrian, please keep up the great work and I wish you the best. I own my original C64 bought new in the early 1980's that I bought to get me through college term papers and I could not have done as well as I did without it. Kudos for all you do!
Ah, Adrian, you have learned the very important lesson in debugging-QUESTION EVERYTHING! ;-) Love it. Keep up the great work. I especially love that you kept at it until you found the root cause. I can’t tell you how many nights I’ve stayed up doing exactly the same thing. Every once in a while, you’ll go to bed out of frustration, get a terrible night’s sleep, only to wake up and go, “duh”, and the problem will be solved instantly… It’s how the mind works… Don’t question it-just go with it. It’s a beautiful thing…
handful of semi useful things to know - the ROMs in Macintoshes use the standard 27XX ROM pinout, so you can easily replace the ROMs with 27C512 EEPROMs if you wish. Additionally, an 800K drive *will* work with a Macintosh 128/512 with the original 64K ROMs. It will only be able to boot from 400K MFS disks, but, once booted, the original ROMs can read 800K formatted MFS (but not HFS formatted) disks. Try it with a floppy Emu and a 128k!
never seen rivets either, good to know! great video as always!
I worked at a repair center as a manger, and repaied also laptops, primters, desktops and took in others as compac , and gateway etc.
Welcome to Adrian's Digital Basement After Dark. Hehehe...
25:35 its almost like those connectors became sacrificial anode and stopped the rest of the thing from rusting, it probably wasn't soaked in water too, just the outside of the chassis.
Thank You for all of the info that you have given us on this particular Mac upgrade. Mac's A Million is the coolest name for an upgrade ever!
The power supply issue is one of them prime reasons why it's always a good idea to make sure everything is working before doing diagnostics, just as you'd point out when doing C64 repairathons, chasing a fault that isn't actually on a piece of hardware is such a pain to deal with, and the facepalm of discovery often hurts... :P
ZAJEBISTY TEMAT "After Dark"! Lubię sobie czasem po zmroku usiąść i podłubać w ulubionym sprzęcie 😎 Keep up the awesome work and keep'em coming!
Thanks for another awesome video Adrian, Mac videos always remind me of high school even though those were Classics I used. I remember seeing the older Plus models in a storage room in the back. I'm sure if they could feel they would show a sad Mac icon being forgotten in the back like that just like this failed Mac. Electronics is surprisingly robust, but it isn't invincible. Enough bad treatment and recovery becomes a chore. It's rarely impossible, but the level of difficulty increases with each component that needs replacing or repairs.
Easy to go down the rabbit hole troubleshooting vintage computers!
Enjoyed the late-night power-supply shenanigans! Didn't see that twist coming at the end, lol!
This 'Darkmode Adrian's' is awesome! Please keep dark mode enabled! :D So cozy!
Adrian White must have sneaked into the basement during the day and removed the +12 pin from that power supply adapter board.
Hahah!! That guy is always causing issues ;-)
ngl, "Mac's a Million" is a pretty clever name.
Sounds like a name of a failed kickstarter. It has that going for it lol.
Oooh! Adrian after dark!
ok the 43:00 moment is great and so relatable :D
as is the later addendum, finding your own mistake, thinking that's it, it isn't, then finding another mistake that's the actual problem
47:45 some time later ... Adrian will find the metal sock of the connector on another board, hehehehehehhehe
Back with another one of them block rockin' addundums
Looking forward to the next video on the second motherboard will be interesting to see the extent of the water damage
The white residue is ionic contamination. According to Chemtronics, "if not completely removed during cleaning, these ions can establish a continuing corrosion cycle, producing more lead chloride and lead carbonate (white residue) and hydrochloric acid, which will attack the copper in the board laminate." You get it from old flux used back in the day if you try to wash it with hard water. They sell a special solvent just for cleaning this white residue (as well as old, crusty or sticky, hard to remove flux.)
Regular old vinegar is good for removing hard water residue. It's basically calcium and other minerals, and citric acid works a charm on it. Vinegar is a weak solution of citric acid, and is a gentle way to clean hard water residue.
@@jeromethiel4323 Vinegar is acetic acid, you'll end up with a bunch of acetates. But citric acid should work a treat, by forming chelate complexes.
@@kpanic23 Look at you with all your chemistry knowledge! You are, of course, correct. Don't know what i was thinking.
I saw one channel use Distilled White Vinegar for washing boards.
Those "minaral deposits" could probably be easy removed using EvapoRust (as well as the rust itself).
Hi Adrian, always enjoy the video's. Before all the work removing the mods for the ram expansion, can you swap the two boards over too see if the working ram board works on the corroded mother board then if the corroded ram board works on the working motherboard, to see if it's the expansion or motherboard causing the fault.
Adrian, I have a bottle of Deoxit 100L (different from the spray you use) that I want to send you. It's so much better. Also, You might want to try some Rustoleum Rust dissolver gel on those d sub jacks. The dissolver gel contains phosphoric acid (like in coca-cola) that converts iron oxide into iron phosphate which is easily removed from the metal. I have used it on some rusty DIP chips with success.
Love the nighttime vibe! 🌃
20:47 Looks like the board was designed or manufactured in Seattle, Washington. Just to the right of the "Inc" part of the company name, between the P and C, is the top of the Space Needle.
26:43 i didn't know those were riveted either.... Always assumed they were flooded with solder, it's so clean looking for a rivet.
I dig the nite time feel! A fun change
Now I know to check if connectors are riveted or not. I also assumed those were solder this whole time.
Hi love your videos. I have an extra mac classic CRT tube and that looked great but the damage to the classic motherboard was very bad, unrepairable. If you are looking for a tube, I am looking for a working keyboard for an Atari 800XL may be do a trade?
I really like the color in the background.
Enjoy all your content. With how easy it was to remove the ram expansion board I was surprised that you didn't try swapping the ram boards to see if the fault was on the ram boar or motherboard or both.
Love the late night motif … and as always …. Riveting!
I like the 'After Dark' vibe nice to watch while in bed.
Hilarious ending to this video. You couldn't let go of the problem this late at night. Hahaha, so funny 😂 Maybe that missing connector pin from your Pico is still somewhere in another Apple motherboard.
Really enjoyed the late night video!
Troubleshooting past 1 in the morning and adding addendums to addendums. That just sounds like peak Adrian to me! 😝
Pebkac, thank you for the video!
My family had a 512Ke with an HD20 and it absolutely worked, although most of the time we used the floppy style HD20 with Mac Plus (and yes I know it would have been much better to use a SCSI drive with the Plus).
The chemical "CLR" is a perfect job for this mess. It should remove the Calcium, Lime and Rust caked on it.
The night time, is the right time for hacking.
Not to beat a dead horse...You could try the RAN upgrade card from the non-working board on the one that actually boots. That would at least tell you whether it works or not. The connectors are already there. It wouldn't be too hard.
I wonder if you missed soldering it, and when you pulled it off the other mac, the contact got yanked down into the connector housing.
I have that same power supply solution for an SE/30 board in a custom case I made for it. I didn't butcher an SE/30, I got the board only that had been "worked on" that I had to actually repair. I don't have any Macintosh chassis, my classic Mac is a iici that I use along with my iigs, so I just designed a case similar to the iigs and printed/fabricated everything needed. The funny thing is, with color through a card along with all the other possible upgrades I could manage to get it's actually a surprisingly strong machine (or maybe not surprisingly, for me that has only used a couple original Macs and a base model Classic it feels like a whole different experience to say the least).
12:21 its because it got "enshrouded"
*Sigh...* Adrian, Adrian, Adrian...
OK, just a few things about the Mac and even Lisa (Mac XL). Note: Anything mentioning the Mac 128/512K also includes the Lasa (Mac XL)
1) The Mac 128 CAN accept 800K Double Sided Drives. and Boot from it. The Issues are:
A) ROMs The non Enhanced ROMs used in the 12*/512K Maca can only use System 1 to System 3.2/Finder 1.1 to Finder 4.1. It can not use System 4.2 to System 6.0.8 / Finfder 4.5 to Finder 6.1.8... BEcause ...
B) You have two flie formats to deal with: Macintosh File System (MFS) and Hieracrhical (sic?) File System. The MFS id a flat file system like on the old 8-bit systems with "fake" directories. HFS has true sub director trees.
2) In the past people tried to mix and match format with utter failure. MFS is for the older System 1.0 to System 3.5, HFS is for System 4.2 to system 6.08. System 7 uses HFS+ which is still compatible to the with HFS and Bootable on the Mac with newer ROMS.
Putting on an older system onto a newer format, you just get a disk that will attempt to boot and then crash. Same if you put the newer system onto an MFS formatted sik, it will attempt to boot and then crash. Also, an older system disk (MFS) will not be abe to read the file content of the HSF disk. The newer HSF system can read an MFS Disk but can not write to it. If it does, it will scramble the directory.
The Newer ROMs found on the 512Ke and Plus will read, boot and write from a older MFS System Disk so there is some compatibility there with older apps and files. HFS can ready MFS floppies but can not write to them or (again) it will screw up the directory. But you can read from a MFS Disk and copy it to a HFS Disk. That is a saving grace os some sort...
The old days of the B/W Macs were basically the Wild Wild West days of Macintosh.
Even back in the early 1990s, Jobs ended use of the Floppy port on Color Mas, he told parts makers to stop making the DB-19, used in the floppy Port. Some did, others didn't. making the part obtainable but expensive. My ol friend and Mentor (RIP) Dr. Hank Levinson , figured out that you can take a Serial Port DB-25 and cut it down and shape it into a DB-19. It took a lot of work but it was doable. You an even cut the hood into shape an d lightly solder the pieces together. A lot of his repairs and modifications are on the Apple II Newsgroups, which aere google searchable. So for us, at the time he made DB-19s because they are also used on the newer Apple IIe/c/gs as well as the Macs.
And just remember one thing, Adrian...
What ever gets you through the night, is alright.
Jobs was over at NeXT in the early 90's. Color Macs didn't ship until he was kicked out in 85. (Or was it late 84?)
Hardware like life finds a way.
I wish I could give this video multiple thumbs up for the addendums :-)
Love the nightcore basement!
"But wait, there's more!!!" :D
This is the dankest Adrian content. Unhinged with the late night second channel content full of follies and jollies. Love it.
@36:00 Yes, you could run System 7 from the HD20. The question is rather if System 7 allows a 512ke with additional RAM to run it.
You'd be stuck with 2 MiB of RAM, as the base 68k can't handle virtual memory.
Thanks for the encores! LoL
Happens to me all the time. PICNIC - Problem In Chair, Not In Computer. 😉
Or as I like to say: "Most computer problems are caused by the nut on the keyboard." 😉😆
Also known as PEBKAC: Problem Exists Between Keyboard And Chair. Or the ID-10T error.
Great stuff Adrian, another very enjoyable video, but careful with all this classic Mac stuff you're going to make me want to get one too!😂 Love the after hours vibe and the never ending addendums, now go to bed!
(continues watching just in case there's a third appendum....)
Does anyone else get excited when they see a new video?
ADB² After Dark...we gotta find you an old copy of the original After Dark screensaver.
ADB? Those Macs don't have ADB, never mind two of them.
you're so smart! what fun
Awww, what a nice vibe!
At the opening I am thinking. “Adrian Black in Black”
Totally loving the after hour mood!
why did you not swap the ram boards between the two ?
Would giving the boards a soak in CLR help with the corrosion
The field found machine was way worse for wear. I think you can get both of these working.
What do you do with all your restoration projects after the fact?
Adrian After Dark
Just connect second memory boart to the first motherboard?
Next week there will be a video troubleshooting the other board. :-)
Maybe try swapping the ram expansion boards
to test the sound/audio remove the headphone jack and solder wires to another jack or phono connectors?
I have a macintosh nubus video card from 1989 that maybe a prototype you can add more vram to it as well seems to be rare.
It really bugged me that you didn't try to diagnose that logic board without the RAM extension board plugged in. Presumably if you populate the LS244 sockets on the logic board it will work just fine without the extension board.
I wonder if the ports on the first motherboard could be salvaged using something like Evapo-Rust? I've had pretty good results with it restoring tools, maybe it might work for the connectors?
Retro Hack Shack guy will be litigating you for the "after hours" theme.
What is the Zilog chip on the board?
Just an idea, but since you don't have the original case and screen, what if you made a portable/luggable or custom form-factor out of it? Cram the motherboard, PicoPSU, RGB2HDMI, and an LCD into another case from something with a dead LCD/motherboard. Maybe even a modern style iMac, the 2010 era iMacs are easy to get for cheap.
Could you test the other expansion board on the working system to confirm if it works?
Always remember what Joe @LyonsArcade said that the hippie told him, "Power supply. Power supply. Power Supply!"
Heh it's just funny to think about my always solid and worked last time I used it PSU had an issue -- well it was just a bad connection. But yeah with the drives, I didn't spend long before I figured out it was the missing rail. No drives were harmed in the making of this :-)
It's all good. You figured it out and that odd issue with the 1 unsoldered pin is certainly easily missed. I can't tell you how many times I've done similar too. Wasting time on a what I am certain is a more complicated issue, only to discover it was something super simple (maybe obvious to others) that I totally overlooked.
Hi Adrian, I would like to see a Video where you put this motherboard in a 3D-printed classic Macintosh-Case with a LCD-Screen and maybe modern keyboard and mouse attached to it...???? Please....
I have something like that in the works actually -- not for these but for another Mac motherboard. :-)
Adrian Black After Dark! 😂
You have to remove the corrosion. You can't do that with water.
Many products out there. Even things like deoxit have acid as an ingredient..
You can totally remove that corrosion.
Liquid Tin - I used to pour this over my freshly done circuit boards. You can do that after removing the corrosion.
But you have to remove the corrosion first.
Shellite / Naptha will probably do a good safe job of removing that residue.
very comfy!
After dark? Where are the flying toasters or fish?
Rust Converter will help the ports on that one.
Isn’t pin 2 on the Mac plus logic board empty? Pin 10 is +12v ?
It happens when you work after midnight that some silly mistakes happen, the other day my monitor started going into a black screen. So I unplugged it and reached for the spray can of contact cleaner, but because I was a bit tired I didn't quite read what was written on the can. It didn't say contact cleaner but contact glue. #&%!. Big error 40. I wouldn't recommend it, but there hasn't been a loose connection since. In Danish, error 40 means human error, the error is 40 cm (16 inches) from the screen. Are you also saying "error 16"?
In English we have a couple of terms for that. PEBKAC (Problem Exists Between Keyboard And Chair) and ID-10T are my favorites.
Heh. You could put the motherboard, with the adapter, into a clear acrylic shell and have it as a "minimalist mac".
Great vid 👍 we live and we learn by our mistakes 👍
Perfmount
Now I was thinking, if you don't have a case the motherboard could go in, maybe build a Mega-mac with an enlarged case that *looks* like a classic mac, but has multiple drives and an LCD screen.
Yeah, I know, that's more like something Sean would do over on ActionRetro.
why not take the memory expansion from the known working 128k board and try on the 512k board? or try the questionable memory board on the known working 128k motherboard?
I want to see a compact mac run from a lithium ion battery and or usbc hacked in place of the original psu
That [?] disk is the "Can't find operating system"
Why not try that ram expansion card on the working system?
obligatory pun: it's a macintosh, so it should stand the rain fwiw...!