IBM liked to go completely nuts with their naming, and rather than "mainboard", "motherboard", or the Apple-style "logic board", IBM documentation usually refers to it as the "system planar".

I won $10 by betting a friend that I can put a motherboard in the bathtub and it would work the next day. Took out all the chips I could, stuck it in the water for 10 mins, then let it airdry. I invited my friend over the next day and he watched me assemble it. Booted up first try. 13 year old me was pleased ;)

That battery that went haywire was from a reputable company, Tadiran! Good work. I worked for a small company in the mid 80s while I was finishing my grad school - we had a contract with IBM and received one of the very first AT computers made. It had one of the hard disks with a design flaw. We went through 3 disks in about 5 months. I had that computer set up so that we could dial in from home with a 300 baud modem and upload our programming work (compiled BASIC and Pascal). We also set up a primitve IBM Personal Computer Network - the great grandfather of all DOS/Windows networks. Looking forward to the next video!

Impressive job so far. This poor machine was really far gone, and now it's looking like it wants to join the living again. Makes me happy. The 5170 has been my dream PC since forever. I first encountered it in high school back in the 80s. We had a class room full of old systems of various kinds, and a singular, but glorious, 5170 with a colour screen. This C64 guy found it incredibly fascinating. So big, so fast, so mysterious. I've wanted one just like it ever since. This was in 1985, they were quite new (and insanely expensive) then. :)

The dishwasher does an excellent job cleaning PCBs. Usually scares people to hear that idea though.

The dishwasher, that’s some extreme cleaning😄! That bracket on the card looks like an ancient artifact with all that rust. Quite impressive what you can achieve with vinager.

Nice save on this machine. I have two of them myself. One I had back in the 90's. All original and one I am assembling. I am sticking with the full size 5.25 drives for both machines. The 2nd machine, I am assembling from parts and adding the XT-IDE so I can boot from a SD card. I had the original case from years ago and used it for other boards but I decided to find a original motherboard for it, which I did find out of Ukraine. A surprisingly perfect original board. What fun!!

i think the word mainboard was more common back in the day when it was more like a back plane to other components but when it got more integrated the term motherboard got more holding if memory serves :)

Seeing you solder makes me shiver.

ALERT -WIFE IS SEEING THIS .

That poor PC... it's so cool that you're restoring it! Great video!

Just call them mainboards. It's all fine. People calling you out on that is just nitpicky.

I really enjoy your videos. I appreciate your thoroughness and your calm delivery.

I love those 5170s so much, so thank you for this video !! Actually I think the hard disk type is "20", as written on the label of the disk. The difference is linked to the interleave parameters I think, so it's more optimized...

Motherboard, Mainboard, Logic Board... We know what it means. If someone wants to be that pedantic about it - you probably don't want to talk to them.

A little late to the show, but here is my method... dishwasher works very well (ultrasonic cleaner is better), compressed air (Not the cans!) to remove residual water to avoid air-dry oxidation of the board components and traces, followed by de-oxit on exposed metal contacts and sockets; and next time, before manhandling the port hex screws, use a little penetrating oil (like WD40) to loosen the rusted parts (gently tapping with a jewelers hammer between attempts to unscrew with the nut driver and gentle scraping with dental picks). Also good, use of vinegar to deal with rust. To take it to next level and definitely "over the top" use spray EMC shield paint on rusted metal shielding parts. (Very expensive, but very clean looking).

Coming along nicely!

Great series! I could feel the frustration of trying to remove the bracket. Been there, twisted that!

GSetup saved my behind 15 years ago when I got a Mitsubishi 286 with a dead battery. It was the first computer I'd ever encountered in real life without a setup built into the ROM and of course all the original disks were gone. Thankfully, Google had already been invented by then :-D Oddly enough I never managed to get that controller card and hard drive to boot in any other 286 or that hard drive with any of my controller cards, that was the first thing I tried, before jumping down the rabbit hole of finding a setup disk. I also had to guess the hard drive type, fortunately it was type 2. That computer ran a CNC milling machine via a dedicated ISA card and DOS app. The mid-term solution was to copy the old hard drive's contents to an SCSI hard drive and then onto a Pentium I with freshly installed DOS 6.22 and Windows 3.11.

Motherboard is the older term I think and predominantly related to PC's during it's popularization. In widespread use when duaghterboards were more common. Mainboard is a more contemporary term, probably coming about as more manufacturing shifted to China and many more technically sophisticated devices included "boards", and not just personal computers. I recall hearing people calling controller boards in refrigerators, game consoles and TV's motherboards, and being irritated by the misuse and appropriation of the computing term. There you go.

I definitely learned something. Thank you

In het Vlaams is het gewoon "moederbord" 😊

Banner Mania!!!! Gave me hours of fun

sure love fast forward brushing....fast movements like cat paws moving so fast

The term "motherboard" was coined by an IBM engineer but I can't remember her name, nor can I find it after a brief google search.

7:07 Seagate ST-4038 should be correctly set to type 20. You can also see this number on the front of hard drive sheet

What's wrong with mainboard? I've used both. Hell, I'm a Mac user, we call it a logic board 😉 awesome video as usual!

And then once removed from the dishwasher, you can go ahead and put it in the microwave the dry off. *This would also be a great time to leave the house.*

Great video and awesome job. Looks like your dishwasher could be secured under the counter - it's tipping when the door is opened...

The 9-pin serial port on the corroded card seems to be the same one that is used as controller ports on the Sega Genesis / Mega Drive. It may be worth taking a look there.

More top repair work from this great channel. Keep it up!

amazing. i glad from Costa Rica

Last week I found a very rusty PC with... wait for it... an 1155 "board" (problem solved) :D in it... not very retro, I know. But it was in the very same shape, as this one. I can understand how that happens to a machine of this age, but 1155? Tone of dust and dust bunnies, rust and some kind of unknown goop was on it. I hosed it down with brake cleaner, then IPA, then compressed air, no water. I still have to repair several bent pins in the socket, then I'll finally see that it was, of course, a lost cause from the very moment I found it. Unlike yours :D Another great video, thanks :D

Hello from Brazil!!

Motherboard in Dishwasher is my personal ASMR

I've got some experience removing trashed MIDI ports off soundcards and replacing them - if you haven't already solved your RS-232/LPT issue, LMK.

Those are some decent repairs :) I wonder if many people donated to the GSetup author? I remember seeing it in the early '90s. After a quick search it seems the source code for it isn't available on the web - it would be fun to see it on somewhere like GitHub!

coming up as an mac technician I got used to using the term 'logic board'

3:40, The motherboard stays in the sun and dry. Then a random dog starts to pee on it.

For that setrial/parallel card, I'd spray it with Deoxit D5, let it sit a few minutes, then scrub it (with the Deoxit still on it). Then scrub it with alcohol. The board itself might be saved, but the connectors could be too far gone. Deoxit is amazing stuff though, so it might clean up the connectors.

First LIKE - Then WATCH! Great job there.

Ah yes, the good old dishwasher method

IBM referred to them as "planars" rather than motherboard. Another trick to dry them after washing is to use alcohol. Soak the board in IPA, which will bond with the water and pull it out. the alcohol dries out far quicker than water. The serial and parallel connectors on the card are standard. You can steal them from anywhere basically. Older ATX motherboards with non-stacked ports are a good source.

Mainboard, motherboard, systemboard it doesn't matter. Most people just call it the hard drive.

8:19 I'd forgotten about the FDREAD TSR. It was used for reading extra capacity diskettes formatted with FDFORMAT. archive.org/details/FDFORMAT

Increased capacitance on old capacitors is often an indication of the onset of failure.

Water leaves minerals, so my advice that you should clean the beard with IPA after to avoid oxidation in future. Use rust remover solutions like MC51... stuff like that. It will eat away all the rust.

@RetroSpector78 You should always use 90% rubbing alcohol to displace the water from the componants and it would help after with the drying portion. And to accelerate the drying after the bath in 90% isopropolic Alcohol, a good 10 minutes in a 250 degree C oven help to evaporate the Alcohol.

are you ever going to upload part three to this?

You can get connectors that will take either screws of socketed pins that spread as you push them through and solder them on the other side. The form factor won't be a trouble. Two local electronics shops here in .au sells a multitude of mechanically compatible plug sockets for db9 and db25 so it should be very easy there also. No stress.

Wondering if the motherboard could be baked in the kitchen oven at a low setting to speed the drying process and insure it is thorough?

Are there more parts to this series ready for upload yet? It’s been 2 months. Lol

Remember that 'fdread' which show up at boot. I used fdformat to format 1,44Mb disks to 1,7Mb and fdread was needed to read them. Later there was a program called 2M.

If you can't find the exact connector for that Serial/Parallel card, you could also do a bit of a "ghetto" fix for now by just soldering cables to where the connectors go and ensure the other end has the female connectors (so maybe if possible find some serial and parallel cables with female connectors, and strip the wires to solder them into where the connectors would go) Though I imagine you can probably use the computer just fine without the parallel or serial ports for now (since the only things i can think of using with them would be printers, serial mice, and serial modems)

I use motherboard. IBM used "planar".

Could you 3D print a casing for the expansion card connectors? Not sure how plausible that is though.

Your videos are excellent with clear thumbnails that pretty much show what is going to happen. What your thumbnails *Dont* need is emojis, not being a hater here but they remind me of those clickbait youtubers... Otherwise great video

Where is part 3?

i would clean it with loads of contact cleaner , since its none conductive it don't matter if 100% dry

where's part 3 ?

I would try a long bath in vinegar or some gel (rust remover) product.

Very nice ! Out of curiosity, what kind of keyboard does this computer require ? AT or XT ? As for cleaning boards with water, I have few advices/techniques that I use that work rather well and take way less time. First of all, though this is my personal opinion, maybe it's totally safe, I wouldn't put nasty motherboards alongside things that are used to eat. I clean my boards in the bathub with soap and a brush to remove all the dust. This is faster than the dishwasher (although it you have to clean many boards, the dishwasher would be faster). As for drying, I use a hair dryer right after the clean. It's much faster than leaving boards outside. That way, I can clean and dry boards in about 20 minutes each. Although it's better to leave them away for several hours after the clean indeed, but two days is excessive in my experience ^^

Get a glass fibre cleaning pen. It works like a charm, but be careful, it can damage the solder mask on the PCB.

If your board doesn't post after washing it, it wasn't completely dry. From experience. You CAN use dish detergent when you wash if you want, it contains an anti-corrosive. Some do, some don't. Also, you can say mainboard or motherboard, either is correct. I usually say motherboard but definitely hear both terms.

what kind of battery do they take? i have one but don't know where to buy a replacement.

sorry for a dumb question: what is ESR and how do i determine if a cap is bad or not looking at ESR?

Maybe your monitor could use a clean too ? Fit's in with the state of the pc, but stil 😉

Somebody hopefully might chime in with more info. But lacking physical measurements of the connectors, I can only guess that they are .590" footprint right angle Amphenol DB connectors. Which that footprint is still on the market today, so their is hope for restoring functionality of the card. The depth is the big issue, because they are deep ones, hense the .590" guess. The modern ubiquitous .318" pcb mount connector would come up too short.

I've heard mainboard and motherboard used interchangeably through my life. Don't know why anybody would be worried about that petty a difference.

i have a 128mb expansion board that came with my at. it works if you need it. i did borrow a tantalum off of it though so you'd need to replace it. LMK

The connectors on the serial/parallel card looks to be standard angled d-sub connectors. Should be cheap from parts suppliers or Ebay.

I find that the easiest way to remove an old PGA CPU from a non-ZIF socket is with the edge of an old slot blank.

go to Jeux! I always do, I have grown my collection this way. Anything cool gets saved onto my server via CF card.

I am not sure I would put the effort into repairing that serial/parallel card, they are pretty much a dime a dozen now if it was something more exotic... :)

Use the Term mainboard, i think it depends to the country.

we can discuss on how effective a dishwasher is in cleaning a motherboard. But my argument is: I wouldn't want a device full of lead and God knows what other harmful chemical products placed in the same place where I wash the dishes from where I am going to eat!!! Be very careful!!

hi i found an ibm 5170 with original monitor in the trash..the monitor no work display messed up.......do anyone know what would happen if i plugged a modern vga monitor to the 9pin video port..(using an adapter 15pin to 9pin) would i get a display to show up on the vga monitor?

Ever heard of toilet cleaner? Cheaper than Vinegar, has detergent in it and you can adjust the acidity by adding water. :P

62940 bytes free... Definetly misread that number the first time 😂

You should put the whole card in vinegar for a day and then brush, it would work better.

Elektronics in a dishwasher? This Feels completely wrong

I think mainboard and motherboard can be used interchangeably. Use whatever you want, we know what you're talking about.

In my opinion you should never wash electrical equipment in water, especially a dishwasher and especially a vintage motherboard. Personally I would have used an IPA bath.

Yeeeeeeeeeeeeeeeeeeessssss first

You have to secure your dishwasher...

Wow, that serial card! That's a challenge for sure.. If it was mine it'd be on its way to the recycling center and the other card would be in the system ;) But that doesn't make for a very exciting video so go for it, I hope you get it working again!

🙂

it's overkill but if you've done PCB Designing. and can duplicate it bit for bit, rebuild a new card using the same IC's, it wont be a REAL IBM card , but at that point your better off using that other 8bit I/O card you showed off.

I use mainboard for Non pc electronica And motherboard for PC. The steelbrush from “gamma” must be from Holland😇 (just like me)

Not first

Well, it was kinda dumb to snip random capacitors off for no reason (tantalum capacitor usually fail short, if they would, the PC won't boot at all) before cleaning an obviously corroded spot.

How do find item like this so cheap?

I thought the recommendation is that you are suppose to let electronics like that dry for a week?

Personally, I prefere the term "breadboard"....

i would have done a quick dry in the oven :)

Use a motorcycle dryer after washing

and don't tell to your wife you're using her toothbrush.

vgacpoy!

Motherboard is a term for when they had motherboards and daughterboards where the motherboard was a backplane, and the daughterboard contained the main CPU, RAM, etc. So technically, the term is wrong. Mainboard is the correct term.

soak it in WD40.