Amiga 600 Black Screen Common Fault Repair
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Күн бұрынTroubleshooting a black screen Commodore Amiga 600 and repairing what seems to be one of the most common faults in these machines. // Get your first PCBs free - PCBs at PCBWay www.pcbway.com/ (Sponsor)
Here's the Amiga 600 schematics shown in the video: www.amigawiki.org/doku.php?id...
Here's an Amiga 600 RAM expansion you can build yourself: github.com/SukkoPera/OpenAmig...
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@catriona_drummond 4 жыл бұрын
Okay, small extra info on the A600: 1. The Kickstart ROM's are working, I actually tested them in another Amiga. 2. The broken off Pin, I am not sure, could be, I reinserted it badly, maybe it was just dodgy enough. The pins are pretty thin anyway. 3. It had no RF shield to begin with - this is how it came from Ebay 4. I "stole" the CF card so it's an HD only in name now :) 5. I compensated for that putting in the broken RAM expansion. ;) Hope it can become a trusty part of your collection.
@JanBeta 4 жыл бұрын
Thank you so much for donating this beauty. :) It's definitely going to get some upgrades in the future and become a valued part of the collection.
@carbonunit3191 3 жыл бұрын
Not having the HD isn’t a big deal. Easy enough to replace with a modern CF card arrangement. I’m sure he doesn’t care! Free A600!
@cadburybunny 4 жыл бұрын
Huzzah!! Love it when a plan comes together! Congratulations on bringing another wonderful Amiga back to life!
@JanBeta 4 жыл бұрын
Thanks! It was a lucky guess. :)
@doktor6495 4 жыл бұрын
Hi Jan. Quick and dirty repair video in the morning and a hot cup of coffee and the day can start! Best regards, Doktor64!
@GadgetUK164 4 жыл бұрын
Great job Jan =D The reset circuit on the 600 is definitely prone to leakage issues. I remember MsMadLemon having a problem with something around there too - possibly the 555 itself.
@JanBeta 4 жыл бұрын
Thanks! Yes, re-watched that video now, too. She had one of the connections to the 555 missing due to corroded traces plus leaky caps.
@GraphicalRanger 4 жыл бұрын
That's was great and timely as I need re-cap my Amiga 600 - Thanks!
@sethrd999 4 жыл бұрын
Nice fix, looking forward to the other fixes on this one for those mods and of course the ram expansion.
@JanBeta 4 жыл бұрын
Thanks! More on this machine coming very soon. :)
@MindFlareRetro 4 жыл бұрын
So great to see you. working on an A600. I got my first one last summer --- and I haven't recapped it yet =/. I can't wait for the actual recapping video. Great stuff!
@JanBeta 4 жыл бұрын
Thanks Mark! It's a wonderful little machine. Recapping video is (hopefully) coming next week. :)
@retroguy4322 3 жыл бұрын
Hey Jan, you made my day too! It was the exact same cap on my A600 with a black screen. I replaced it with a non SMD version because I didn't have one. Works great!
@JanBeta 3 жыл бұрын
Ha! Glad to hear that. :)
@ToTheGAMES 4 жыл бұрын
Early bird catches the worm :) Good morning Jan!
@subtext9881 4 жыл бұрын
Awesome! I am looking forward to seeing the follow up video. Again, nice catch!
@JanBeta 4 жыл бұрын
Thanks! Follow up coming next week (if everything goes according to plan).
@JoeMcLutz 4 жыл бұрын
Nice job Jan! :)
@Four_X 4 жыл бұрын
Excellent repair Jan. I enjoyed this video very much.
@JanBeta 4 жыл бұрын
Thank you! :)
@carbonunit3191 3 жыл бұрын
Thanks for posting this Jan! My 600HD is doing the same thing I think? Power on, caps lock light is on constant. No video output.
@esshahn 4 жыл бұрын
well done as always, thank you for sharing Jan
@JanBeta 4 жыл бұрын
Thanks! :)
@brostenen 4 жыл бұрын
Another 600 saved. Well done sir.
@dangerousdeo5113 9 ай бұрын
Absolutely love your content, sadly my A600 was working until there was like a sweet smell coming from the capacitors, now I have no picture and a lit cap lock key! So got new capacitors on order for the beast hehe! :)
@Xoferif 4 жыл бұрын
I really like the A600 - it's a really neat little system, inside and out. =) A friend gifted me one many years ago, before he emigrated to New Zealand. I'll have to get it out and have a play. Well, after your recapping video.
@JanBeta 4 жыл бұрын
I love the form factor! Back in the day, I thought these were pretty useless because I already had an A500 but nowadays it's really cool to have such a compact Amiga. :)
@vix_in_japan 4 жыл бұрын
Aha! Hunting High and Low (for reset signals) ☺️
@JanBeta 4 жыл бұрын
Lol, I see what you did there! :D
@10MARC 4 жыл бұрын
What a lovely little machine the A600 is. We all rolled our eyes at them in 1991 (for good reason) and now we all want one because they are so cute!
@JanBeta 4 жыл бұрын
Yes, it definitely makes a lot more sense from today's perspective. Again a machine that was marketed incorrectly back in the day. Commodore should have made it the low budget A300 they had initially planned and it would have made more sense I guess. :)
@10MARC 4 жыл бұрын
@@JanBeta Yes - a $150 machine that could be a real replacement for the C64, and maybe reclaimed some of that market would have been nice.
@fabiosemino2214 4 жыл бұрын
HI Jan, your video prompted to take a look today at my neglected A600HD because there is a ram expansion in there, I was sure it was one without the RTC but I was mistaken (A601) so my Amiga (and the ram expansion) booked for me some TLC time for itself!
@JanBeta 4 жыл бұрын
Oh, hope nothing got damaged! :)
@fabiosemino2214 4 жыл бұрын
Jan Beta it was really horrible to see but once Treated with vinegar and brush it got much better, I need to find or create my WB disks to find out of the expansion is working, the ram section at least, the amiga itself has no damage and no apparent cap spill but a recapping is on the way for it, and also a CF HD adapter, pcmcia, you know, you maybe stop only when it’s done :)
@StuartCowan 4 жыл бұрын
Nice repair!
@epromenator 4 жыл бұрын
Hey! Great vid! Is the same capacitior problem touches A1200? Thnx
@JanBeta 4 жыл бұрын
The circuit is the same, I think the layout is a bit different on the A1200 so it's not quite as common a problem. But the capacitors are very likely to be leaking if you haven't replaced them yet. Definitely look into doing a full recapping, all of the machines from the era I've seen so far had leaky capacitors.
@epromenator 4 жыл бұрын
@@JanBeta Thank You for info :) Great content! Keep it goin!
@danielson9579 4 жыл бұрын
Can't wait to see the final result with the expansion card and cf card inside it 🙂
@JanBeta 4 жыл бұрын
I have plans! ;)
@lucataszarek8782 2 жыл бұрын
Hello, Mr. superfilm, could you please tell me what is the value of ten electrolytes or 10uF at 35v? Thank you in advance and sorry for my English
@naderhumood1199 3 жыл бұрын
Jab bita......Great job...I'm sending you a big solout from Kingdom of Bahrain 🇧🇭
@SaintKaede 4 жыл бұрын
Wow, I mean I agree that you should change all the capacitors on old computers like this, but wow can't believe the fix was that easy, I will keep that in mind for future reference, love to see what happened to the expansion board so I will watch out for that then.
@JanBeta 4 жыл бұрын
It was an educated guess more or less. I read about the little cap being a common fault and smelled the fishy electrolyte so it was one of the first things I tried. SMD caps from that era are literally all bad so they (or corrosion caused by leakage) are always suspects.
@RobA500 4 жыл бұрын
Great work, another Amiga saved from the graveyard👍. I’ve had to recap two A4000 boards so know that smell well.
@JanBeta 4 жыл бұрын
Thanks! Yeah, I think most of the caps from the era are leaking. At least in the machines I have openend so far.
@xsm5525 Жыл бұрын
When your a600 wasn't working, was the led for the capslock always on?
@JanBeta Жыл бұрын
I don’t remember 100% but I’m pretty sure that it wasn’t permanently on (I very likely would have noticed).
@alfredocassano3194 3 жыл бұрын
Hi Jan! I just recapped a fully working A600 (to extend its life) and now I'm getting a black screen and no bootup at all. I also replaced that 10 uf capacitor again just in case but I get no signal. The power led turns on, but not the drive led so I guess it's not starting up for some reason. I measured the voltage on pin 3 of the 555 and it stays up at 3.5V. I did the same measurement on a working amiga 600 and the same pin shows a voltage peak then goes to zero. Any idea what could be the problem? I think I did the recap correctly (already did it successfully on another a600 and 1200) and on this special PCB all the pads were really in good conditions and clean. Thanks in advance for your time and your awesome videos :)
@JanBeta 3 жыл бұрын
You might have a bad 555 timer IC, they do break occasionally. Maybe worth a try to replace that. The reset line on the 555 should go high for a second and then go low, as far as I remember. It is then inverted by a logic chip and fed to the processor, should go from low to high there and stay high so the system is active.
@alfredocassano3194 3 жыл бұрын
@@JanBeta Thanks Jan! Tried that, and also the new 555 unfortunately stays up with the voltage instead of going down. Any ideas? At least I can rule the 555 out. Thanks in advance :)
@thomasstaack7858 4 жыл бұрын
Great Video. I have also a 600 and there are Not recaped yet.
@davepauljones 4 жыл бұрын
Thanks Jan, I have a few 600 1200's to recap, with various faults, I let you know if I have success, does any one have stock codes and values for replacement capacitors, as I need to buy in bulk, must be high quality, cheers Jan
@m.m.2132 4 жыл бұрын
John Chucky Hertell has a great blog about recapping Amigas wordpress.hertell.nu/?p=464
@JanBeta 4 жыл бұрын
Here's a very handy site with capacitor lists with part numbers (you can just copy+paste the numbers into the search function of electronics suppliers): www.ikod.se/repairs/capacitor-lists/ Used it to order caps for the full recapping of this machine. All Panasonic long life, high temperature caps.
@Laskarides 4 жыл бұрын
Hallo Jan, heute ist es auch soweit mit meinen Amiga 600. Von jetzt auf gleich geht mein Bildschirm schwarz und bleibt auch so die ganze Zeit....🤕🤕🤕
@HoboVibingToMusic 4 жыл бұрын
Been wwtching these amiga repairs, waiting for my GoTek to come over and finally, see my 500 fully working. Tho my case needs some work. Epoxy kit may do it. And retrobrighting after.
@JanBeta 4 жыл бұрын
Hope all goes well with your A500. :)
@HoboVibingToMusic 4 жыл бұрын
@@JanBeta thank you kindly! :D
@DomedagsPoeten 4 жыл бұрын
Best equipment for recapping smd’s is a clothes pin to put on your nose 😁
@JanBeta 4 жыл бұрын
Haha, true. The smell was lingering for some days in the little lab. I'm just happy I don't do repairs in my bedroom anymore like I used to. ;)
@robertmiles9942 4 жыл бұрын
And safety glasses :)
@HalifaxAmiga 2 жыл бұрын
Great thanks :)
@ManfredRauer 4 жыл бұрын
I have a Amiga 4000cr Rev D that shows the same Issue (Black Screen after PowerOn). Can it be the same?
@JanBeta 4 жыл бұрын
If it hasn’t been recapped, leaky capacitors can cause all kinds of problems. I think the reset circuitry is rather similar to the A600 so that might indeed be the problem. There are other points of failure that could cause it (like bad contacts on the RAM for example). Recapping is highly recommended for all Amigas that have SMD electrolytic caps, I’ve not seen a single one where the capacitor were no problem.
@RETROCENGO 4 жыл бұрын
Ohhh that fishy smell in Amiga 600 board’s. Yes you are Absolutely right, all Amiga 600s should have a recap job. Ive been very unlucky with my A600s, but not the A1200, interesting to know if commodore used two different type caps. Congrats with the repair buddy, allways nice to save Amigas Best regards
@Channel-Zx 4 жыл бұрын
There's nothing worse than a nose full of that smell when ur troubleshooting!
@brostenen 4 жыл бұрын
@@Channel-Zx But it is quite simple. Just recap a 600, once you get one that have not been recapped. The smell is cap's anyway. 😁
@JanBeta 4 жыл бұрын
Thanks! Oh, all the A1200s from the era I have seen had leaky caps, too. Maybe the models that were produced after Commodore's demise had better capacitors though. I have only worked on the older models as of yet.
@RETROCENGO 4 жыл бұрын
Jan Beta They should all be recapped today yes, but my main rig Amiga500plus is still running strong with its original hole through caps😁🕹🕹🕹
@Channel-Zx 4 жыл бұрын
@@RETROCENGO all my amigas have been recapped .....except 1000 its due this year!
@NotNews 4 жыл бұрын
If you have a dead a600 can I have it? I'd like to convert one with a jeyrah
@KenjiUmino 4 жыл бұрын
could you replace that electrolytic with a ceramic capacitor ?
@JanBeta 4 жыл бұрын
Yes, these machines work with multilayer ceramics. I did a full recap with ceramics on my A1200. However, I would no longer recommend doing that as the characteristics (and especially the timings) are slightly different with ceramics vs electrolytics. You may run into problems with certain accelerator cards etc. Replacing this particular cap with a ceramic should work without any problems though, as it's just a delay for the reset.
@bobingabout 4 жыл бұрын
I should get a Kickstart 1.3, 2.05 and 3.1 ROM switcher for my Amigas, maybe also 3.1.4 ROM too.
@hyumahoshi 4 жыл бұрын
Is possible to make an Amiga PSU with modern parts/components?
@JanBeta 4 жыл бұрын
Sure, it's a pretty standard 5V/12V/-12V PSU. You can make one or get one of many that are readily available and put a cable with the correct connector on it. Even the 5 pin square DIN connectors are available again as new parts these days. :)
@hyumahoshi 4 жыл бұрын
@@JanBeta Thanks! I'm looking for some tutorial to make one, or maybe you could make a video where you build one of them like the c64 psu you built some times ago!
@Txm_Dxr_Bxss 3 жыл бұрын
My A600 got water damaged and the caps are a little leaky. The power LED doesn't turn on. It only shows a solid purple screen at boot and the light on the capslock is turned on constantly. Any idea what could be broken?
@xsm5525 Жыл бұрын
I have the same issue, with the black screen, and the capslock led always on, did you ever resolve this problem?
@Txm_Dxr_Bxss Жыл бұрын
@@xsm5525 yes, it was just one cap in the reset circuit.
@chrisshaw451 4 жыл бұрын
Should I recap my Amiga 1200s and 500s even they they are working fine. I do keep a check on them for signs of leakage and or swelling though.
@AndreAguiar 4 жыл бұрын
Chris Shaw Definitely recap the A1200. I don’t believe the A500 caps are prone to leaking like the A1200/2000’s. I had mine recapped but I was a tad too late as my mouse input was affected due to leakage. And don’t think that if you haven’t turned on the Amiga in 20+ years then there’s less of a chance of a leak. Don’t risk it, get it recapped so that you don’t have a much bigger headache later on.
@chrisshaw451 4 жыл бұрын
@@AndreAguiar Thank you
@JanBeta 4 жыл бұрын
Yeah, I totally agree with Andre. All the Amigas from the A600/A1200/A4000 era I have seen with SMD electrolytic caps had leaky capacitors. Definitely replace them. The Amigas with through hole components are fine most of the time. Obviously the caps are old and it would be a good idea to replace them anyway but most machines I saw still had okay caps.
@chrisshaw451 4 жыл бұрын
@@JanBeta Thank you, both my 1200 boards are packed ready to go for recapping :)
@InsanePsychoRabbit 4 жыл бұрын
Sometimes it's possible to lift up the warranty sticker to get to the screw hole, and then stick it back down so it looks like nothing happened. Then again, with something that's been out of warranty for over 25 years, it doesn't matter anymore.
@LeftoverBeefcake 4 жыл бұрын
Boy I wish all electronic repairs were that easy... :P
@JanBeta 4 жыл бұрын
Haha, yeah, unfortunately not all of them are that trivial... ;)
@blackterminal Жыл бұрын
Jan please next time list the component part in the description so we can easily find it. :)
@kokodin5895 4 жыл бұрын
i remember moding one of those for a friend . we pigibacked 2 or 4 extra ram chips on top of oryginal ones with i belive chip enable lines routed to the 2 pins on the ram expansion port and it worked great i wonder why people did expansion the "easy way" when just pigibacking 2 chips leaves you entire expansion port empty for something else
@JanBeta 4 жыл бұрын
I guess most people were not aware of the piggybacking method and/or could not solder too well. ;)
@kokodin5895 4 жыл бұрын
@@JanBeta the fun part was my friend owner of the amiga told me what and where to solder, provided ram chips i was only the person who knew how to solder things in this case and i did it in a different way than i was told anyway :P because otherwise keyboard would not fit. i remember putting more ram chips on a stack next to a keyboard, since both ram chips were connected to full memory bus and there was continuity between all data and adres lines on both chips my friend was kind od shocked and did not belive it would work, but it did, workbench showed all installed ram just fine
@trr94001 4 жыл бұрын
I dealt with this exact problem last year. In my case the 555 had also failed due to leakage corrosion.
@JanBeta 4 жыл бұрын
Yes, really seems to be quite a common fault. Hope you were able to fix yours.
@jaycee1980 4 жыл бұрын
@@JanBeta I just fixed one today.. in this case, C612 had leaked and destroyed Q511 ! All good now though :)
@rawberg_se 4 жыл бұрын
Nice... i just sent away my a1200 for repair, it got a similar issue, black screen then reboots (no Kickstart screen). If I removed the rom it just sat on a black screen (no reboots), so yeah... might just need a recap.
@JanBeta 4 жыл бұрын
Yeah, literally all the Amigas with SMD caps from that era have bad capacitors. It might very well be the issue with yours, too.
@rawberg_se 4 жыл бұрын
@@JanBeta We'll see I guess, I saw now obvious sign of leaks but I learned that you don't always see it. Only thing I saw some green corrosion on one of the IDE pins which's a bit weird?! Anyway, thanks for a great KZfaq channel.
@Alphadec 4 жыл бұрын
To switch between 1.3 and 2.05 there was a software that did this called relo-kick. That instead of doing this sort of hack this had done. Hate to see all sort of switches on a amiga, even a A600/300.....
@JanBeta 4 жыл бұрын
Yes, but relo-kick is not as compatible as a real KickROM. It uses parts of the RAM to store the KickROM and pretends it to be located at the ROM's position in memory. Works fine for some games though.
@Alphadec 4 жыл бұрын
@@JanBeta Okey I did not know that. remember I did use relo-kick since I could not get "galaga" to load with 2.05 so thats why I needed this software and worked great for me.
@zeewolf4302 4 жыл бұрын
I have a A1200 with the same problem... maybe has the same solution? i will give a try...
@JanBeta 4 жыл бұрын
I think in the A1200 the circuit is basically the same but the layout is a bit different. Definitely worth a try. And definitely look into recapping the whole machine if you haven't done that.
@jaycee1980 4 жыл бұрын
@@JanBeta A1200 is similar, but the reset part is not done by a 555 - it is done by a dedicated power-on reset chip.. so it is less likely to fail
@tenminutetokyo2643 Жыл бұрын
That’s nuts!
@hollgo626 4 жыл бұрын
Die Präzisionsfassungen gibt es auch als Stiftleisten, habe ich für den switchless c64 switcher schon erfolgreich eingesetzt. Sonst sollte dem kick switcher nicht viel fehlen. Ich möchte jetzt auch nen 600er, so klein und 2mb chipram mit ram erweiterung ist doch was ....
@chrisshaw451 4 жыл бұрын
For those of us that do not know German.......... The precision sockets are also available as pin headers, I have already used them successfully for the switchless c64 switcher. Otherwise the kick switcher shouldn't be missing much. I would now also like a 600, so small and 2mb chipram with ram extension is something ....
@JanBeta 4 жыл бұрын
Habe den KickSwitcher jetzt tatsächlich ohne neue Stiftleisten wieder eingebaut. Der hat so wenig Luft nach oben, dass es schwierig ist, da irgendwas anderes einzulöten. Werde das aber auf jeden Fall mal im Auge behalten.
@ARANBANJO75 4 жыл бұрын
I recap but Yellow composite video exit dont work.,..
@JanBeta 4 жыл бұрын
Maybe you have some damaged traces near the video out. It's a pretty common fault I think because the capacitors in that area leak a lot usually.
@larsenmats 4 жыл бұрын
uuhh.. Jan Beta with an Amiga 600 repair. nice ;) A600s have crap build quality VS Amiga 500. But they are nice little retro computers with some nice and compact whdload possibilities
@JanBeta 4 жыл бұрын
Yes, the form factor is really cool. At least from today's perspective. ;)
@larsenmats 4 жыл бұрын
@@JanBeta I have recapped 3 Amiga 600s. All A4000/A1200 and A600s should be recapped immediately. Luckily mine did not have any damaged pads yet. Even though there was some leakage. Looking forward to your next A600 video
@datacreed 4 жыл бұрын
wow, I forgot how small those were (after owning an A500)
@JanBeta 4 жыл бұрын
Yes, I was quite surprised when I had it on the bench, too. I quite like the form factor. :)
@analognexus 4 жыл бұрын
Don't forget to replace the 2 capacitors in the panasonic diskdrive.
@SLRModShop 4 жыл бұрын
You could at least have pretended it was a complicated issue, poor Katrina... ^-^
@JanBeta 4 жыл бұрын
Haha, I feel a bit sorry but also quite relieved it was such a small issue. ;)
@catriona_drummond 2 жыл бұрын
Oh, I didn't fail at fixing it. I didn't even try. I have 2 working ones and found this "known broken" model for cheap on Ebay and thought I donate it to Jan, so he finally has a 600. I actually relieved it wasn't something unfixable.
@SparkyMAWy 4 жыл бұрын
Think that might be the problem with my A600.
@JanBeta 4 жыл бұрын
If the capacitors haven't been replaced, those are definitely the main weak point in the A600s. All the Amigas from the era I have seen so far had leaky electrolytic SMDs.
@Hagledesperado 4 жыл бұрын
1:03 That's funny, my A600 also has black screws. Makes me wonder.
@JanBeta 4 жыл бұрын
Mh, maybe they are the original screws after all. Never seen black screws in any Amiga so I just assumed they were put there by a previous owner given all the mods that have been done to the machine.
@Hagledesperado 4 жыл бұрын
I also assumed that my black screwes were non-original. Oh well, maybe it's a coincidence, maybe not. We need to look at a lot more A600s to be sure.
@catriona_drummond 4 жыл бұрын
@@Hagledesperado The screws on this one were just a wild assortment of nonstandard screws. I think there was not a single original one among them. my other two A600's have silvery screws.
@Hagledesperado 4 жыл бұрын
Oh well, just a coincidence then I guess. At least they do the job. :)
@rossdag4232 4 жыл бұрын
hello jan theres 3 to 4 electrytic cap neeed replacing near rf output module bwack made a video on this a while back are u a genious i think u have talents get a job in electronics company theres heaps in germany yuo make better money than here just idea i know your gettting bettter bye ross sydney
@The_Last_Ninja 4 жыл бұрын
Not first. :-(
@lee-enfield0247 4 жыл бұрын
600...The shorten and halfed powered version of The Amiga 1200 😂 Just jocking. Or not.
@JanBeta 4 жыл бұрын
Lol, there's a bit of truth in that. ;)
@monoinformatico3015 4 жыл бұрын
First
@monoinformatico3015 4 жыл бұрын
@@Okurka. 39
@stevewelbert5039 2 жыл бұрын
Clueless
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