 So I was doing some work on my nice new Amiga A600 the other day And I discovered that some of the keys on the keyboard didn't work, which isn't great I have fired up QRF's diagnostic tool, which lets you test the keyboard and you can see that the keys all respond except for help Well now it works of course But it's kind of dubious Yeah, it's only firing occasionally. Control. Is that going to come back to life now that it's on camera? No, it's not. The two Amiga keys and Having control and the Amiga keys not work is kind of important because you have to press control Amiga Amiga to reboot it and the down cursor key The other cursor keys work Just not down. Obviously the keypad doesn't work because it's missing so I am going to take the lid off this thing and open up the keyboard and See what is going on? And while I'm at it, I am going to try and open up the mouse because Some of the contacts there need to go to clean as well. The right mouse button is kind of dubious So I've already had the screws removed or to be more accurately I didn't put them back in again the last time I did any work on this So we unplug the LEDs and Then we unplug the keyboard connector if I can Get the latch open So So the computer itself goes safely away The keyboard itself unclips these two clips here get pushed aside and then the thing just lifts slightly clumsily out It's There we go so the daughter board with the LEDs on it stays on the case and Here is the keyboard with lots of little screws so Let me find an appropriate screwdriver and Let's start removing these. There's a lot of screws Anyway, the back plate comes off reviewing the membrane So what I suspect has happened is Help keys here So what I suspect has happened is that the membrane is dirty So when you push the keys the plunger slides up and makes contact between two Copper pads. Yeah, and there's a lot of fluff inside the membrane So what I'm gonna do is To just clean this off with some IPA and see if that helps Yes, the amount of green that came off is a little dubious. That's probably Resist yeah, it would be these green things here I Hope that's not important Let's get the fluff clear Okay, so we power it on and it should boot Okay, test keyboard with F2 Looks better. How about control? No, the two Amiga keys seem to work down No, okay pushing hard makes that work, but not the down key Right this That's she that's slowly getting better But it's still not good enough. Okay, and The down cursor key doesn't work at all. So let's investigate the down cursor key okay, so Down cursor key is here and This is the plunger for it. Does the plunger actually come out? That would be nice I'm not sure If you remove the key cap Which actually rather than just wrenching it off. I own a proper key cap puller. So yes Okay, so This will push down like this so we get the meter out and We can do some continuity testing. Okay, I can figure out where one of the lines goes to This one I think okay, the tracks don't seem to be particularly dead What's about the plunger itself? Is it? still making Electrical contact doesn't look like it. What do we get for an actual resistance? So 100 ohms What's about a representative other plunger 100 ohms? so It seems like it should work. I need multiple fingers to actually test this Well, the other thing I need to do is to check for continuity to the end of the ribbon because These are kind of prone to cracking a crack in the track will cause Various things not to work. I would expect other keys to be failing if that were the case So and it's the second from the right So that's this one. I get all of this on camera. I suspect I probably can't mmm It is indeed second from the right. It's almost working Looking at the resistance Again, so 60 odd ohms just from here to there Which is not brilliant double check by looking at one of the other lines That's goes to here and that goes to here 300 ohms, okay So that does all seem reasonably reasonable Okay, so here we have Just the membrane plugged into the computer So first thing we want to do is press F2 to get to the keyboard Diagnostic so hopefully I should just be able to close these two contacts with the plunger Okay, this is the plunger from the down arrow key. So I know that works so this is Registering not very reliably, but that's fine Right arrow There's quite a lot of fluff in here actually that's not gonna help Yeah Okay, well the back of the membrane is non-conductive by the way Okay, so let's try up L semi-colon No out Interesting, okay, let's try one of these so we touch the contacts to the two pads and The key registers So let's try our down and we get nothing That works. Oh down did actually register there. There we go so I am uncertain what to do here other than to order a new Membrane so this seems to be working absolutely fine, but not with the plunger See this is triggering fine shift is not Down arrow is not Okay, now back on the continuity tester. I've discovered that if I touch one of these pads and then Scan along here that one That is making good enough connection That the meter can detect it and let's actually check the resistance of that one. I need to find remember which pad it is Here we go this one 35 ohms Which we suggest that what we were seeing earlier at a hundred ohms is wrong So let's find Let's actually find the control key that's this one because we know this one is sort of Sometimes working or at least it was so these are changed together I think to here and then it ends up at the right hand One of these pins so it should be the here come on Need more fingers right and that's doing nothing So let's just double check that Yeah So that is making contact So let's try Here to here that will be nothing. Okay So is there a break somewhere along here? Well, there's a crease in the cable here That's been there since forever So this is the other side of the board. We can see the tracks rather more clearly the tracks are printed on This side and then this green solder resist is glued on so If I get a reasonably sharp thing you can expose a little bit of Track Okay, that works. Let's try here. That does not work. I don't want to scrape too much or else I will Cut the track itself Nothing there I hope I haven't actually damaged the track there. I think there's actually a possibility I have so Let's Do this a little bit more carefully Okay Yeah, I have I Cut the track Let's check from here to here. That also doesn't work. I still think that this is This track is damaged. It's certainly damaged now So I'm going to try and bodge around it I'm hoping that this my law will take solder But we're still not getting a connection from here to here Which does make me think that There's something wrong with this ribbon. I don't spot Anything that's interesting the finger here that goes into the socket is Making very poor contact. Let's try one of the other fingers See that's working all the way through But this one is not so Yes, I think that this part of the membrane is defunct Right well Unfortunately, I don't think I can bodge around that so it's going to be new membrane time Which was a shame as I had stuff I actually wanted to do with this Amiga. That's why I had it out I suspect that well, I know I've damaged the track around here but I Suspect that the other stuff I was doing has probably wrecked it as well Well, that is annoying Anyway, the membrane was clearly defunct to begin with But it was just not defunct enough that I could get stuff done on it. So Okay, I'm going to have to order a new membrane and come back So here is the new membrane This came from our WAP software in the UK. It is brand new not new old stock Membranes are still in production these days for, you know, everything like most keyboards use them If you compare it to the old one The new one it has thicker looks more robust. It's got a matte texture to it rather than a smooth shiny texture it did arrive With this crease here, which is a little bit concerning But hopefully it's okay But the only thing to do now is to install it and see if it works as I now know from Hacking about with this these things are way more fragile than they look Hopefully this one is more robust, but I am going to be much more careful with it than I was of the old one So after taking all the screws out again We open up the keyboard and then the membrane should just drop in Like this and that should be all there is to it I have noticed one interesting thing which is that If that's not a good way to show it over here, this is the pads for the return key This membrane has got two sets of pads in parallel as far as I can tell While the old membrane only has one set of pads I think this is because this is for a ISO layout of keyboard with the tall return key While this is a universal membrane which should work on anything so it's got the two sets of pads for The two positions the return key can be in And now I look at it These two are In parallel, but these two are not so possibly this is for a different key in a different keyboard layout But it's a universal Membrane there are apparently two types of membrane for the tarry 600 green ones and blue ones So I had to order a green one to match my old green one So now we put the lid on and do up all the screws. I will spare you that Okay, so here we are All wired up to the video capture and ready to plug in. I've got here F's disc tools in The drive so all I need to do is to plug this into the connector here Like so push down the clamps That doesn't look like it's gone all the way in it has not let's try that again So you lift it up to release the clamp Push it in There we go and goes all the way down then The clamp goes down. This is Much firmer than the old one was like so That's good and tightly connected right so Moment of truth we boot it to get at the keyboard tester. Okay keyboard F2 That's not good Caps lock light is not lighting either Now what is wrong? Try Receasing this need to lift the clamp which is tricky yes because the new connector is Thicker the new cable is thicker than the old one The clamp has locked in place rather This is going to need What I can really do on camera be back in a moment Well, I have discovered something interesting so if I test continuity between this pad and This pad up here Don't get that on camera. It works if I try and test continuity between this pad Which is then connected to here I? Get nothing, but if I connected to here It works This track is broken, and I bet it's happening there Fantastic I have managed to replace my old broken membrane with a new broken membrane So here is the crease from this side, and I can't actually make anything out on the little camera screen and Let's have a look at this side Hang on that's the this side that I think is broken so it's getting a good view of that and I in editing I will let you know via Subtitles if I saw anything so this sucks I'll have to get back to the vendor to see what they have to say about this It might be repairable I need to get some Conductive silver paint for that I suppose But honestly Given that I paid I think 25 to 30 quid for this I Think I would rather get a replacement so We're going to break here for another couple of weeks and See how that goes. Well, it is several weeks later, and I have a replacement keyboard membrane I can't fault the suppliers customer service who just sent this to me no questions asked So let's see what it looks like. So we open it and Here is a membrane How does it look doesn't seem to have any creases the contacts here look kind of peculiar The ones down the end of a different color Let's Find the meter from wherever I put it. So Let's just check this contact to here Yep, that works Let's check See this one goes all the way around to here So it should be this one and this here Yes Right, I think that's just covered with something so now scraped is a little let's try that again there and Okay, that's better Well, it's not an exhaustive test, but it's better than the other membrane. So Let me install that and Then we'll hook it all up See how it goes. Well According to my camera it takes over six minutes to do up all these screws So now I suppose the only thing to do is to Plug this into the Amiga motherboard get out the composite video recording hardware and See whether it works Okay, moment of truth time It's all hooked up. I noticed that the cable tail here is longer than on the original So I'll have to be careful not to crease it When I put the case on let's apply some power. Well, that light went on which is a good start So it boots Okay, here we are with the test kit test keyboard Right This is looking good so far. Yep, that is You see the light is toggling correctly Even the blank key seems to be working Let's just move that up a bit Bottom row. Yeah, just me pressing the pressing two keys at once. Yep The down cursor key is looking good Out Amiga space Amiga out fantastic. I do believe that I have a properly working keyboard right, let's try the actual Control the Amiga Amiga thing which wasn't working previously and see what happens It boots well it rebooted. So I take the disc out and we should get workbench Brilliant and I forgot to plug the mouse in so I can't actually do anything with it But this does seem to indicate that the new keyboard is working fine, which is fantastic Finally the long nightmare is over So I can put the lid back on this thing do the screws up And have a fully working Amiga Now there is one more thing that I was going to do which is to Repair and clean the mouse This is mostly fine except the right mouse button is unreliable and as the Amiga uses that a lot I need to try and fix it somehow when I got this thing. This was Disgustingly filthy and I have attempted to clean it The mouse ball is still rather brown So I'm going to have to figure out a way to get this open now I have identified where the screws are which is under this label And as it's quite a nice label. I wonder if I can actually just Peel it off You know what I'm going to use the hot air gun for this That will help get the label off Okay, it's set to 100 which is the lowest it will go So we toast the label a bit And does it want to peel off On the whole no Here we go Okay And with luck the adhesive on the label will continue to work Under the screws All right, and apparently there are some fragile plastic clips at the front So There we go. That wasn't so bad So the two buttons push Just see these moving These two prongs which go down onto These two Rather cheap and nasty castanets which is So I believe that these will want switch cleaner They're not as clicky as they really should be They'll be easy to replace but they would need to be replaced with ones that are very precise Height And I do not believe I've got any Plus they do work so I don't want to fiddle with it too much. I know let's take the board out Can I take the board out? I'd have to undo these screws that would remove the This black plastic piece Now another thing that needs cleaning of the rollers You can normally do this from the inside, but They're covered in fluff Heaven to know what this stuff is. It's probably really repulsive The rollers themselves actually seem to be reasonably clean They do get covered up with gunk And it's usually A cement like substance made out of Dust glued together with sweat Mice are not very nice on the inside That's one of the reasons why optical mice took off so much They're just cleaner Okay contact cleaner So I don't need much And hopefully that should permeate inside the switches Generally make things better One last remaining thing to do which is to Just give the Trying to open a packet of Baby wipes The last thing to do is to give the Outside a quick clean with some moist baby wipes These aren't quite the best things. I know for getting general dirt off The best things are stain removal wipes, which I've only ever seen in the uk I haven't been able to source them here But these are okay Okay, and the ball wants a clean Will avoid any of the obvious jokes Honestly, they kind of write themselves And then reassemble okay, so Cable loops around here and Goes out through the strain relief Make sure it's pressed Down into the gap Oh, where is that clip? There is the clip. No, it's not Ah, that's the clip this piece here It hooks in there, so That wants to go on like this And then we do the screws up all drops into the hole Wheel goes on Clips in place and let's just give this a squirt with contact cleaner since we have it out So let's get the newly repaired omega out plug the mouse in and see how things go Lights not on why is that light not on I did plug the cable in But suddenly booting right mouse button is working. I can get at the menus Yeah, um This is a little awkward for me to use because I have a slightly different video setup, which means I'm seeing everything through about a second of lag Which is really annoying But it does seem to be Working in puts it looks okay to me that closed button gone Plus I can't see the corners of the screen. Okay. I believe that this is now working I'm not going to play with it now because This is just terrible to deal with um Do want to know why these lights haven't lit up But I that's a minor issue. It's probably just a matter of me not plugging the thing in Or something like that So I won't bother doing that on camera I am pleased to report that the keyboard now does seem to work. Where do I put my shell? Here it is That looks like an alphabet to me The cursor keys do seem to work Up and down Well, they did do something excellent So I'm going to call it here In real life terms this particular video was probably taken about two months to make I'm very glad at how a working amiga again. There's a number of things I actually want to do with this Including more videos Anyway, I hope you've enjoyed this I forgot to put the sticker back on Where did it go? It's somewhere here. Well, I can't find the sticker But I did take the opportunity to plug the led strip in and yes, they do indeed work I'm sure the sticker will show up at some point Uh, apart from anything else, I'll see what happened to it when I review the video. I'm not going to bother doing it now so I have an amiga that works again Hopefully this time it will stay working for a while I hope you enjoyed this video. Please let me know what you think in the comments