Wildly underrated channel, a true vintage hardware enthusiast.

Austrian cursing = instant like! I jumped when it happened

If there's ever an appropriate time to swear, it's when stuff blows up. :-)

I thumbed up for the genuine Austrian swearing. :) It's a good idea to always check those evil tantalum capacitors, and replace them if needed before powering up any vintage motherboard. You've been lucky with the battery leak, as it didn't start to eat into the tracks. I've seen much worse corrosion.

4:00 wow.. great contend the honesty an realism... i love this channel... no commercial BS, glitz and glam but authentic moments like this.... witch i can relate to

Fine work Sir! I often throw parts through the dishwasher, when the wife's not looking, obviously!

An exciting start and a happy ending. Glad to see that you will be able to continue to enjoy this old board.

Amazing the space the memory alone takes up on the board. I had one of these back in the day and now that I see it compared to what we work with today. its just insane how far we have come.

Explosive episode! I quite enjoyed it, thank you.

I don't know about where you are CPU Galaxy, but in Australia, something going boom and a person cursing in there native tongue, is funny to most people. This video is comedy gold.

You wont get any complaints from me washing the boards. I do the exact same thing and I have done more boards then I can remember now. Soap and water under the sink then i blow it of with compressed air. The reason for using compressed air is that I get water stains otherwise, plus it drys faster and its nice to get the water out from under any solder on chips, out of sockets and slots. Then I dry it at about 50-60C in the oven, 1h minimum from my testing equals dry. I find that the battery often corrodes one or more of the traces to the keyboard connector, so very common that one has to do trace repairs, did that on a 386 board for a friend recently and it was an internal trace so probably corroded VIA. The worst I had to deal with I had to remove a NOT hex gate and socket it after doing trace repairs under it plus the chip next to it for the keyboard ans such I also had to trace repair and solder a new socket to plus it had corroded off traces to a ram buffer chip, was a Bison III socket 4 board wit heavy corrosion damage, got it working eventually. And with a lot of soldering and repairs its nice to clean any flux of, some flux can cause havoc in signal integrity if not cleaned off, plus washing the board just makes it look new like you showed. People are usually suspicions to water on electronics but its mostly fine as long as its dry when powered on again.

I love these kind of classic PC repair videos! Also from that region, I watch Jan Beta in Germany repair Commodores and Amigas! Both are great technicians!!

Mahlzeit:) Bin von Dave hier. Subscribed. Eine Anmerkung: Diese Methode ... den Tantal-Elektrolyt-Kondensator platzen zu lassen nennt man in der Instandhaltung die "Todesstrafe" oder die Erlkönig Methode: Der Elektroniker lebt ... das Kind, der Patient, das Reparaturobjekt ist tot! :))) Hat in diesem Fall in extremer Geschwindigkeit dazu geführt die Fehlerursache zu finden. Sind zwei Fehlerquellen persistent oder fluktuierend ist diese Methode nicht Zielführend. Was unseren kapazitiven Freund aus sich herausgehen ließ passiert übrigens auch auf dem ganzen Strompfad. Mit den Layern der Platine, Lötverbindungen und z.B. Steckverbindungen. Das muss nicht, aber kann langfristige und intermittierende Störquellen induzieren, die in erster Linie absolut unnötig sind und vermeidbar waren. Ein Restaurator von Kunstwerken verwendet eine Riesengeduld und fast comichafte Methoden um zu vermeiden etwas zu beschädigen. Dies würde auch dem Auftrag der Restauration zuwider laufen. Mit Retro-Hardware ist es ähnlich und deswegen mein Vorschlag: Jeder ordentliche Elektroniker benutzt zur Fehlersuche ein Netzteil mit Strombegrenzung. Damit meine ich nicht die Kurzschluss/Überlast-Sicherung vom AT-Netzteil, auch so eine "Todesstrafe":) Das soll kein Vorwurf oder Belehrung sein. Mir tun einfach die Komponenten leid;) Ich hätte das hier auch nicht geschrieben, wenn ich vorher das MFM-Festplatten Video nicht gesehen hätte. Auch großes Glück! Die Restaurierung ist auf jeden Fall schön geworden. Danke für das tolle Video:)

Have been watching a lot of videos but here I will finally comment. Great content you create there, one can even learn a lot about restoring, setting up and tweaking old hardware. I also came across an exploding Tantal in a keyboard once, I can smell it when I see it. Greeetz, gert

Hallo Peter! Herzliche Grüße aus der Steiermark (Lannach). Sehr gutes Video! Sehr angenehme Stimme! Und Deine Reparatur: Fantastisch! Du machst mir Mut einige alte Mainboards zu reparieren, die bei mir auf Lager liegen. Und ich glaube Du hast mich gerade mit den Abonnenten überholt (ich hab 6000). LG, Max

This was so great! Really good info and great job on the restoration!

Great machine! Nice to see the top end 286 parts. And that Tseng ET400AX is the dream for an ISA PC. Only thing I would have done differently is a button cell battery, looks like there's room for one on the board. I get that you want to keep it original, but we're also archiving these components for the future, I think it's unnecessary to risk future damage just for originality. Some sacrifices must be OK to make to ensure that the parts keep working.

Always the tantalum drop caps ! lol

That looks like a Chaintech logo on the motherboard! Didn't know they were that old!

Beautiful repair. Gives me hope that some of my old hardware may live again. Thanks

That exploding capacitor shocked me to hell! And I like that vinegar. Especially the german text on it :D

I still have a box of 10 287 xl's all new in the box, picked them up for $5 each in the early 90s when a local store was closing down, maybe get around to using them someday.

I have a 286 setup I'm trying to restore as well. Wonderful machines. I can only hope mine turns out so well.

I knew I had seen that Accolade before but could not place it. So when you showed winter games that was the moment. i haven't seen that in 25 years :D

4:00 POP GOES PERFECTION!

Very nice board, luckily the corrosion was on the surface only, no eaten traces, not even flaky soldermask. I'm all for keeping things original, but for me the board-killing batteries aren't going anywhere near a restored motherboard. Fully agree with washing the boards in the sink, I have a full range of substances that I'm using , from dish soap to brake/carburetor cleaner, depending on the degree of filth :)

My very first PC, a 286 we bought at Karstadt in Hamburg (I believe it may have been the one in the Einkaufzentrum Hamburger Straße around 1990), may have also been an AMD processor, but it was 16 MHz. It did come with issues with the real time clock though (in hinsight, possibly a Dallas RTC). I have the faint hope of one day being able to replicate that setup. The specs were: 286 with 16 MHz, 1 MB RAM, Trident TVGA 512k VGA adapter, 40 MB harddrive, 5.25" 1.2 MB floppy (drive A) and 1.44 MB 3.5" floppy (drive B). I would however upgrade it with a 287 math copro, up the RAM to 2 MB, ditch the Varta battery and replace it with a standard CR 2032 coin cell, and change the harddrive with an SD or CF to IDE adapter, or even find a SCSI solution.

Finally I found worthy good video - with explosions!

Crap on TV and Dave Jones EEVBLOG showed a microscope video of you and your CPU'S leading me here and it made my Christmas.

Very nice amazing and nice cleaning the board looks amazing!!!

The 286 was such a hot mess with its 24bit protected mode.

Its fascinating that technology has evolved soo much I wonder how did one come up with such an idea of creating a cpu

Really enjoyed this video! Thank you for another fine video friend! 😀😀👍👍

id be worried that there was still battery acid under the socket, might have been worth replacing completely with a new one. I would have also considered a complete recapping. Nice to see old hardware running again, thanks for sharing.

I have one board 286 25Mhz, and 287. Baby board very good, 4MB ram, 5 slots ISA 16 and 2 ISA 8. Drive 1.2 and 1,44, video ISA Cirrus Logic 1MB, Soundblaster, hdd in slot isa ( 20Mb) ide controler UMC, modem USR 14.400, Dos, Windows 3.1, many games, old VGA color monitor. AMAZING!

Sehr interessant. Ich verwende die gleiche Essigesenz von Surig. :-)

What an effort! I am surprised 286 runs PoP smoothly. In actualy, i am always suprizing in this channel.

Wow, haven't seen Moto GP in almost 30 years. I remember being blown away by it back in the day, having seen only the ZX81 and the 2600 before it.

Chaintech's 286 motherboard. Never had one in my hands or forgot it already.

:D De depperten Kondensatoren imma! Schaaaß! :D +1 Like from bavaria! That's the reason why I always replace EVERY tantalum cap before switching on those old boards- there's always a good chance, that they explode- and I'm VEEEEERY scared, so I try to avoid those situations. If I want to know, if a board works without replacing, I switch it on while I'm not in the same room. :D

aww, the magic smoke got out

Very good job !

Good restoration and loved the copasator burnout wahnsinn haaaa

Very good!

Excellent video.

Nice video!

Exploding tantalum are fun to watch

I have a sneaking suspicion that this guy refurbishes ancient nuclear launch systems.

Oh, a very nice board! I have 2 ceramic 286 boards on my repair pile too so I can't yet test my ceramic 286 CPUs. You know what happened when I tried them? I remember that at least one of them worked for a few hours but I'm absolutely sure that both got there with exploding tantalum caps by the power connector. How surprising :D

I have a 386 board with battery barf that has messed up the board a bit. Battery replaced but it no longer is charging nor keeping date/time. Damn I wish schematics were available. As for those Tantalum caps, I recently turned on a 2-way radio portable repeater and of course the magic smoke erupted from one of the caps on the final amp. I plan on shotgunning all of the tantalum’s as soon as I can get an order in for a bunch of caps for various projects either Mauser or Digi Key will be receiving a large order. As for my board I chose to remotely hang the battery to prevent another round of corrosion. Back in the eighties we used to use R12 refrigerant to blast everything off of our boards.

Wow! Ich versuche mich auch gerade an der Restauration eines 286er Boards. Wenn ich dieses Video sehe war ich bisher wohl viel zu vorsichtig. Unverdünnter Essig in rauen Mengen, Wasserhahn und Backofen wären mir nicht in den Sinn gekommen!

You are AWESOME!

Quite lucky with so little damage there.

I always expect them to go these days. it's a shock when they dont. Keep up the good work. Great youtube channel

1:30 Nice! I have a handful of 80186 in CLCC form. Don't recall what they were removed from.

6:56 Y2K compliant BIOS.... nice

This channel is great.

an exellent video!!!!

CPU galaxy swears? But you usually have the manners of a calm computer museum curator! LOL just messing with you. Great video as always

I did a 286 board the other day. 4 of those bastards exploded and yea they EXPLODED like small fire works. You might ask then why did you not check for shorts, well I did kind off. I did not expect 4 to blow but maybe 1, and in the end I expect them all to blow. The thing was that even if I removed a bunch of them there was never a full short, there is always continuity between gnd and +5V with most old boards, your have components that do draw current from the +5V rail that is soldered to the board. In this case about 18ohm resistance or 1.4W @ 5V if my math is right. I removed about 20 or so of them intact after the first two blew and a lot of them where removed before the last one exploded to but none of the once I tested after removing had any indication of a short as long as they where not powered. So at least in my case it seems that the short is not measurable because it will happen WHEN enough voltage is applied and or current flow to or from the capacitors. Thats the reason I removed all of them in the end and replaced them with modern electrolytic because after 4 exploding and not finding a single one shorted after being de-soldered I figured they where all ticking time bombs. They where all of the same size and model, there where other models on this board to but none of those had an issue. The board is now fixed, new electrolytic caps instead, 2032 modded with charging diode removed, some corrosion cleanup etc. Boots from floppy and disk now. But yea I would replace all tantalum capacitors just in case on my boards just because there ticking time bombs and if your unlucky they will roast a trace on the PCB and then you have to repair that to. I ended up using the same value Electrolytic of high quality, both have polarity and the later one usually dont explode and usually fails open rather then short. But in the end one might not be able to measure a short, at least with the once I had to deal with there where low resistant at best, 9-10 ohm and when all removed it was about 18ohm but that was just one of the 4 exploding being "a slow burner" and it went of late. Anyways If I do a board for myself I'm gonna remove them all because now Im afraid if explosions XD

really nice! - a question: with the big battery are there modern day more reliable versions? or do they all have this time bomb ticking?

I recognize the logo on the mainboard - it’s made by Chaintech.

dieser kleine Tantal-Kondensator hat sozusagen voll abgestunken ;)

12:10 for ASMR

That was quite a nice job. What is the strange looking I/O connector near the memory sockets?

Like ever!

20:55 how was the spiced, washed baked chips 😁😁

What's in the extended setup menu? I've never seen one of those old style BIOSes have that option. Is it just hard drive formatting utilities?

Great video but note that vinegar does not neutralize acids. Vinegar is an acid... You would want to apply baking soda to neutralize the battery acid.

Electroboom, is that you? :P

Have you ever heard of a computer manufacturer named, Eastern Digital? I could not find anything on Google and have a nice tower built by Eastern Digital with a motherboard that needs repair! I think this piece is extremely rare.

I have repaired circuit boards with corrosion before though not computer motherboards. To help to keep the corrosion from coming back, I would just spritz the repair area with clear lacquer. Just sayin' Mike

For my 386/40 I was looking for a good graphics card. A dealer friend gave me a bunch of graphics cards to test. In the end I chose one from Oak, which was by far the fastest. If you ever get bored, maybe you can compare some ISA graphics cards? Benchmarks were rather uncommon back then, "performance" was rather measured in color depth.

Nimh cells are good if the device is in regular use, while self discharge is slow these are under a small load, a low charge will see the battery electrodes eat themselves, leakage then follows.

Über eine Folge komplett im tiefsten Österreichisch würde ich mich sehr freuen. :-)

NIce to know that the 287 FPU i put in my 286 PC is the fastest one, didn know.

Moin, habe mir dieses Video gegönnt, da ich selbst am restaurieren sind. Hast du zufällig auch etwas in Richtung AMD K6 - 2 450AFX? Habe einen mit 450mhz gestanzt auf das Jahr 1998 und etwas gelesen das es da wohl auch Raritäten gibt. Würde mich interessieren ob du du da etwas mehr weißt. PS das Board funktioniert einwandfrei nachdem ich es nach deinen Methoden gereinigt habe. Bist gold wert mit deiner Arbeit. LG

11:26 - я заменяю эти гацкие танталы на обычные электролиты. Да, они сохнут и т.д., но их хотя бы не пробивает статикой в КЗ с последующим фейерверком.

Did you need to individually remove all that RAM first before you cleaned it, or was that just to upgrade capacity?

these boards XT and 286 are only double sided ? or they have intermediate layers like new motherboards? ty

uooo nice fireworks here! it always happens. Love to see you cursing!

PLCC=Plastic Leadless Chip Carrier :)

exploding caps ... OOOOH!!!

Awesome! Now fix it!

@ CPU Galaxy You can also use a supercap as replacament for cmos battery.

Can i buy that corrosion cleaning liquid in england ? Very Good Video :-)

I want to know the results of benchmark 10Mhz overclocked vs 12 native

If the board functions without that blown cap, what was it's function in the first place?

Heidanei!

What did you use to clean up the keyboard CPU (8042)? Same as for the mainboard?

Tantalum capacitors don't like over -voltage conditions and when they are pushed they do like to explode. Perhaps you ought to invest in a rheostat to bring the power up slowly.

Hey wait! Why was this tantalum soldered in the wrong way? And how could you film the explosion on a different angle? Was there a second camera installed? ;)

lucky about the copper traces did not get eaten out

this is why i never turn retro devices on as the first step. always check for shorts first!

I've clocked many 8Mhz 286's at 12Mhz without a single issue.

Das "depperten Kondensatoren", Highlight für mich!

Get into tha chopp......286 mainboard.

Ich hab hier immer noch diesen riesigen NCR PC8 286er da stehen und trau mich nicht, da Strom drauf zu geben... In Deinem Video sieht man, warum. Der hat Vollausstattung, 2 fette RLL Platten drin. Wahrscheinlich 8 oder 12Mhz, nicht sicher... aber demnächst trau ich mich mal. www.old-computers.com/museum/computer.asp?st=1&c=541

The Bill Gates 640 Legend! --- 640k was enough given the architecture of the original 1981 IBM PC, in which this statement has its context and sense. Since, its been repeated to appear Gates had a lack of foresight (despite dominating the software industry later!) Later in his career Gates responded to a student who inquired about it: "I've said some stupid things and some wrong things, but not that. No one involved in computers would ever say that a certain amount of memory is enough for all time." ... the legend lives on today!

Bill Gates (and some other Microsoft employees) stated he never said that with the 640kb. It was most likely a decision about the mainboard layout of one the first IBM PCs which created that 640kb-limit.