Can I fix this broken Apple IIc Monitor?

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A viewer donated an Apple IIc monitor that wasn't working. Let's try to figure out to get this working.
0:00 Intro
0:29 Unboxing
2:06 Disassembly and troubleshooting
35:05 Testing the CRT
35:56 Outro
Apple IIc Monitor
A2M4090 - G090S
(Hitachi Version)
-- Video Links
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/ adriansdigitalbasement
Adrian's Digital Basement ][ (Second Channel)
/ @adriansdigitalbasement2
SAMS Photofacts for the Apple IIc monitor: (this is not the same version of the monitor)
mirrors.apple2.org.za/ftp.app...
Monitor IIc teardown and retrobrite:
• Part 1: Apple Monitor ...
• Part 2: Apple Monitor ...
-- Tools
Deoxit D5:
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Elenco Electronics LP-560 Logic Probe:
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Hakko FR301 Desoldering Iron:
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Rigol DS1054Z Four Channel Oscilloscope:
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TL866II Plus Chip Tester and EPROM programmer: (The MiniPro)
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TS100 Soldering Iron:
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www.ebay.com/itm/TS100-65W-MI...
EEVBlog 121GW Multimeter:
www.eevblog.com/product/121gw/
DSLogic Basic Logic Analyzer:
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Magnetic Screw Holder:
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Universal ZIP sockets: (clones, used on my ZIF-64 test machine)
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RetroTink 2X Upconverter: (to hook up something like a C64 to HDMI)
www.retrotink.com/
Plato (Clone) Side Cutters: (order five)
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Heat Sinks:
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Little squeezy bottles: (available elsewhere too)
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--- Links
My GitHub repository:
github.com/misterblack1?tab=r...
Commodore Computer Club / Vancouver, WA - Portland, OR - PDX Commodore Users Group
www.commodorecomputerclub.com/
--- Instructional videos
My video on damage-free chip removal:
• How to remove chips wi...
--- Music
Intro music and other tracks by:
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@itsnathandivino

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Опубликовано:

4 авг 2024

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Комментарии : 291

@AndrewTubbiolo 3 года назад

I've said it before, and I'll say it again. Adrian is the kind of guy who really knows where his towel is.

@Crsdawg 3 года назад

He's a really hoopy frood.

@flaturiah 3 года назад

I stuck out my thumb and found my way here. What's up?

@fragglet 3 года назад

If he ever does merch I hope he includes reproductions of that towel

@DumahBrazorf 3 года назад

"The least serviceable monitor ever". Apple already leader in the '80s.

@MD4564 3 года назад

Apple is still the leader in the 2021s. :D

@KenKeenan1973 3 года назад

I had an old Mac Quadra once (700 model IIRC) that required you to remove the floppy drive, hard drive *and* power supply to get at the RAM slots! Apple have always been notorious for this kind of thing

@artstrutzenberg7197 3 года назад

Sounds like they took a lesson out of the playbook for most vehicle manufacturers....

@SpearM3064 3 года назад

@@KenKeenan1973 It wasn't just limited to Apple, though. I'm a computer tech; back in 2001, I remember working on a desktop computer (if I remember correctly, it was an HP model) where in order to get to the RAM slots, I had to remove the hard drive, floppy drive, the entire drive cage, and _then_ the power supply.

@mojoblues66 3 года назад

Bullshit comment, because you can't have both, an extremely compact device, and lots of space to make the device easy to service.

@JamesPotts 3 года назад

"Let's get to it?" What have you done with the real Adrian!?

@maxtornogood 3 года назад

All is not quite "right" in Adrian's world!

@amirpourghoureiyan1637 3 года назад

Clint's possessed Adrian!

@timmoen1083 3 года назад

Furreal, it hurt me.

@HeffeJeffe78 3 года назад

In the early 90s I had a IIc monitor on my computer desk in my bedroom hooked up to an old VCR tv tuner to act as a TV... parents didn't allow TV in our bedrooms but thought this was just another computer.

@rawr51919 3 года назад

Smart workaround, they never noticed

@brentboswell1294 3 года назад

Peter Jennings must have looked goofy in green 🤣 I tried hooking up old monochrome composite computer monitors to video equipment a few times, but the only phosphor color that was watchable for me was white.

@smeezekitty 3 года назад

@@brentboswell1294 Better than nothing

@megaglowz8540 3 года назад

Needed a FUUULL BRIDGE RECTIFIER!! And a lot of other work lol. Great diagnosing Adrian. Love the way you go about troubleshooting.

@basvanharen2904 3 года назад

booom

@natethefighter 3 года назад

I'm glad you showed us what can happen when something is just beyond repair. It never means that it's a total loss, there's always something to salvage and take away!

@paveloleynikov4715 3 года назад

With demagnetized screwdriwer you drop screws reliably, while with normal magnetized screwdriver you drop only that screws that will cause most harm and/or end up in most unreachable place. Murphy's law is pain.

@kaylaandjimbryant8258 3 года назад

Just like the thousand dollar chip will always protect the ten cent fuse by blowing first?

@macdaniel6029 3 года назад

Fun fact: This monitor is exactly 37 years old today.

@HoboVibingToMusic 3 года назад

Don't make people feel old. ;)

@pe25 3 года назад

Happy Cake Day for this Mother of Monitors! 🌹🥳

@fluffycritter 3 года назад

Now I feel less bad about how much yellowing I've experienced personally

@CanuckGod 3 года назад

@@fluffycritter I'm almost 6 years older than it, but I've gotten greying as opposed to yellowing 😂

@TheSCSIBug 3 года назад

A green phosphorus Mac Classic would be INCREDIBLE.

@sierraboney1394 3 года назад

Whenever I work on an arcade monitor or a computer monitor, if I have to test the psu section I always power it up with a dummy load connected to the B+ output or you can get weird things happen. On the arcade monitors I use a 60w 240v (i'm in the UK) incandescent/filament light bulb (you can't use a power saving one) as the B+ on Hantarex monitors for example can be anywhere between 105v and 145v depending on the chassis. On that Apple monitor you'd probably get away with using a 24v commercial light bulb or 2 12v ones in series of some wattage (maybe a headlight bulb or two). The monitor's OCP (over-current protection)/x-ray protection circuit was almost certainly kicking in when the screen got too bright. CRT image looks nice and sharp though if nothing else!

@colinstu 3 года назад

this reminds me when I took apart a projector. that thing had 10000 screws, and they were ALL different. Basically everything had to be unscrewed and split apart at the same time. Needless to say, it did not go back together.

@anthonysantiago1999 3 года назад

Adrian, You Sir are a Mad Scientist! Thought I was looking at an Old Spaghetti western with all those wires. Great Video.

@scharkalvin 3 года назад

If the CRT mounting holes are in the right place, you might be able to mount it in the Mac with spacers and longer screws.

@ryuzan1995 3 года назад

You have so nice camera now :). I just tried watching your videos with my PC and it's so clear and nice. I love your show and you really got me into fixing things again. I've been fixing phones and PC:s but seeings you fix stuff makes me appreciate older generation tech more.

@PyroRob69 3 года назад

I began learning about computers on one of these ][c monitors, and they hold a special place in my heart. Watching you bring this monitor back to life brought back so many memories.

@parrottm76262 3 года назад

The green Mac display is so COOL! Makes the entire effort worth it.

@justinchampion5468 3 года назад

I always love watching your repair videos, Adrian. I had a IIc as my primary computer for a few years until I replaced it with a IIgs that I modded the hell out of! I have to say that I'm *NOT* a fan of the green phosphor, but seeing any vintage Apple II parts in working order makes me happy. Thanks for sharing another fun project with us!

@hernancoronel 3 года назад

38 minutes of Adrian’s goodness! Awesome, thank you Adrian!

@0xTJ 3 года назад

At 15:45, I'm sad you didn't say that you're going to "rectify" the situation.

@Peter_S_ 3 года назад

Always a good repair. Well done, Adrian!

@DJBTerroR 3 года назад

Send the PSU to Bigclive, He'll reverse engineer it in the blink of an eye. (Or he just cuts to it XD)

@EmperorKonstantine01 2 года назад

Apple never expected these monitors to last the decades they were always significant with newer, better devices and hardware. They squished everything and all the electronics together hoping have an impact on the compact computer market back in the 80’s but it came with a hefty price. Smaller moulds meant cheaper or lesser materials used but money went into the design, I am myself an experienced technician but even repairing one of these was seemingly a challenge for the first time, manufacturing materials have drastically changed over the years and sourcing parts have become a time wait other then locating them.

@Fred_Raimer 3 года назад

You never cease to amaze me with your skills and attitude, Adrian!! Even though I understand little, I always enjoy! Thank you!!

@TheSimTetuChannel 3 года назад

Gloves matching the t-shirt logo color, now that's what I call repairing CRTs with style!

@StuBonham 3 года назад

Perfect timing, just after GadgetUK's premier!

@chadhartsees 3 года назад

That's great that it's a strong CRT! That might save another monitor or system someday.

@neverthehero566 3 года назад

Yet another thrilling walkthrough in the digital basement.

@saifal-badri Год назад

Adrian I have the same exact CRT I fixed it following your video, thanks a lot

@stefanobaron 10 месяцев назад

I've just find the same Hitachi model of the //c monochrome monitor. Ir have the exactly same problem with those pesky diodes. The 4 diodes on the retifying bridge on the power supply almost evaporated the body leaving only the leads😂 another evaporating diode D510 on the power supply. Will change those 5 diodes with 1N4007. Analized the circuit and followed the PCB traces. Drawed the schematic diagram. If somebody could help me identify the Q502 transistor I would be grateful. Mine had the label almost vanished. The glass diodes and the zenner diode are almost impossible to identify as well. The capacitors I've managed to identify all of them. As well as the resistors. I was wandering if the whole power supply circuit could be swaped for a fixed 12V with a 7812 (1A) regulator or a powerful equivalent one for 2A current.

@DerMarkus1982 3 года назад

02:05 "SERVICING IN THE FIELD" / "CRT implosion protection and cleaning" on your own monitor. That alone makes you appear really professional to me. Apart from that detail, your whole style of delivering content got me hooked. Thumbs up!

@arongooch 3 года назад

Love you vids Adrian. Definitely nothing wrong with that big electrolytic. That's the way they're made with the plastic dome on top. I remember seeing similar in the G3's back in the day and thought the same thing.

@TheFurriestOne 2 года назад

Oh hey, I have one of those! The matching computer too. Not gotten either to work yet, but haven't tried very hard since I don't have a power-supply for the IIc itself. Man, now I hope my monitor isn't the Hitachi version! XD But I thank you for the video, as I can now test the power-supply for proper voltage first, whenever I get to it.

@WiztotheIzzard 3 года назад

Green Mac Classic - Love it!

@mowersman 3 года назад

Really helpful video. I picked up an Tatung CM1495 EGA monitor a while back that has no sign of high voltage. This has given me as a relative beginner a few things to check next time I pull it to bits (Don't worry, I have made myself very familiar with the safety precautions for working inside a CRT)

@Rocky1138 3 года назад

Seeing the green Macintosh display was really cool. I love it, too. The quality of the CRT looked great once you got it all hooked up.

@draggonhedd 3 года назад

Please install this in a compact mac. They look FANTASTIC with the green CRTs. like your fancy classic II or an SE/30 Ive seen a few folks do it and i love love LOVE how it looks.

@warpedmetalhead 3 года назад

What a nightmare. Good job Adrian!

@Dukefazon 3 года назад

Keep the monitor parts, you might get another working one that helps figuring out what's wrong with this one on the PSU and the control board. I'm sad you couldn't fix it but it was still entertaining and educational to watch!

@LadislavAlexa 3 года назад

31:50 - It's cute how the high voltage cable disconnected itself... :D

@threepotMR2 3 года назад

"I might as well just tug at everything else" = typical saturday night in my life

@erichkohl9317 3 года назад

Dang I didn't think I would like the look of a green Mac, but man that looked awesome IMO.

@ibmmac 3 года назад

In the 90's My dad worked at a computer shop and built a green Mac! With a broken IIC monitor and a Mac that someone and dropped and cracked the CRT. I will have to ask him about the mounting it looked original until powered on. Someone happily bought it and enjoyed the green look as a daily driver.

@DrTofu83 3 года назад

My very first monitor was a CM80, green phosphors. I used to hate it, but now I really miss it :)

@FinalBaton 3 года назад

Yassss crt episode!

@DatBlueHusky 3 года назад

i have one that works but its having horizontal problem so that leaky cap most likley is same problem in mines. Also did not expect it to be that hard to take apart, its going to be fun

@RetroSwim 3 года назад

I did a green CRT conversion on a Classic II in one of my old videos. The CRT came from an old bit of HP test gear! Definitely adds a splash of colour to the Mac. :)

@ultrametric9317 3 года назад

Good effort. Defeated by Apple's world-class parts sourcing and board design :) Man was a jumbled mess!

@TheRetroChannel 3 года назад

Wow, that thing looked like a big old mess. I wonder if it was the x-ray protection kicking in when the screen was getting way too bright. Shame there's no schematics to be found, but at least the CRT is still good and it certainly makes for a nice little green phosphor display

@deadlyche3014 3 года назад

adrian this is the same day as created my monitor from scratch so cool

@RetroTheory 3 года назад

With the right length screws and some spacers I bet you could get that green CRT into a compact Mac.

@UpLateGeek 3 года назад

As others have mentioned, the CRT from the IIc should fit into the Macintosh with some spacers and longer screws. It looks like it's actually in fairly good condition all things considered. At least in the brief glimpse we saw. I'd definitely like to see a Mac Classic or Classic II with a green screen!

@drewpartlow9813 3 года назад

Great content.

@CDP-1802 3 года назад

Wow, I had no idea the //c tube could work in a Mac! I wonder if you could make or 3d print spacer/adapters to be able to mount the monitor in a classic case. I've been working on a 1981 Macintosh prototype replica using acrylic and an SE/30 logic/analog board, I might have to try and use one of my broken //c parts monitors.

@ovalwingnut 3 года назад

Good show... I have approved this video. (agree with your diagnosis and course of action :) Cheers!

@desiv1170 3 года назад

Looking forward to this one. While I like my //e with it's color monitor, the //c with it's little green monitor is the Apple I use the most. It's just so compact and nostalgic. Great vid. Funny, when you said the Mac monitor wouldn't work in the //c monitor case because the brackets were on the outside, my first thought was that I wondered if it might work the other way then, just by adding some type of spacers in the Mac to get the brackets to reach the case. ;-) Great vid!

@Walczyk 3 года назад

id love to see this fixed lol, its nearly there!!

@CrazyTechReviews 3 года назад

On putting that green CRT in a compact mac, it may actually be possible, you might be able to slide some kind of washer or spacer through the screws in between the case and the mounting ears on the monitor so that it will fit in the mac classic case, you might have to use longer screws though than what came originally with the compact macs.

@Electronics-Rocks 3 года назад

Lol I remember repairing CRT I used to have plastic sheets to slip between boards while repairing them in the eighties.. Look for the Zener diode which will give your voltage reference In the psu

@theretrogeek789 3 года назад

you can probably make or get someone to make adapter mounts so you could be able to put that green display in a Macintosh

@jaimecosta2966 3 года назад

Excelente vídeo

@crossboon 3 года назад

I love this channel🙂

@MajorCadence 3 года назад

Same, Adrian, same. I always dread trying to fix a dead monitor (or any power circuit without schematics). Digital stuff is one thing, but old analog monitors are another. My rule: If it's not working when I power it on, and it's nothing obvious (like power supply, fuse, etc) but something weird like it blows its HOT, or the vertical deflection is messed up, I normally just toss it into my pile of non-working junk. Sometimes they're just more trouble than they're worth. (I often wonder just how Shango066 does it)

@valentine_puppy 3 года назад

This entire episode all I was thinking about was "The Brave Little Toaster." I just kept thinking that poor monitor, gone to the electronic store in the sky and it's body used as parts so it can save the life of another.

@sr.padilla1633 3 года назад

For the horizontal circuitry, fast recovery diodes is a must. You Can't use regular rectifiers.

@SidneyCritic 3 года назад

Because I don't know how to fault find - lol -, I just removed one part at a time from my A/C PS and tested them off-PCB with a ebay transistor checker. After you remove 50 parts the other 50 can be tested on PCB, because most of the connections are cut by the removed parts. All you need is good photos so you can put the jumble of parts back on - lol -. I was thinking you could flip the mounting band that has the feet, but it looks spot welded.

@alerey4363 3 года назад

11:53 well, that's a constant in apple products, zero repairability, upgrade and recycling

@electronicsworkbench Год назад

Quite interesting stuff Adrian. I like the videos of monitor work a lot but noticed there may have been times a tube could have been mounted in another case. You actually can flip the implosion band around if the attachment points are the same as the case it is intended to be installed in to get the correct mounting depth. This is especially true for bands that have a tension bolt. For anyone reading this that might not know, the band is nothing more than a director on older CRTs whereas newer generation CRTs (mid '70s I think) contain integral protection making the band nothing but a mounting system. The band on older CRTs without integral protection designs was to prevent the glass from blowing out the circumference of the tube between the thick face and the thinner glass of the body and gun channel. This directs the glass to blowout the rear once the atmosphere outside and the vacuum inside equalizes. The band has nothing to do with keeping the tube together beyond providing mounting points and implosion safety. If anyone has any updated info about this, please share for the benefit and safety of all. I'm going from memories of my own and experience through my dad.

@douro20 3 года назад

MacIntosh systems from the 68040- early RISC era also are quite prone to cracking plastic.

@lauram5905 3 года назад

The actual process of the yellowing of the plastic tends to make it quite brittle as well, much like C64 breadbin cases

@sm98710 3 года назад

Hi Adrian, I love your channel. I look forward for each episode, every week!! I gotta a question that I never gotta clear answer for from anyone: when putting things back together, how can you tell which screw goes where? I always seem to put some screws in wrong places and when I finally discover that I did so I’ve already made too much progress to go backtrack. Curious to know your process if you have one.

@markae0 3 года назад

You poke holes in cardboard (with the screws) in the same way it looked before disassembly.

@rastislavzima 3 года назад

I had the IIc with monitor with stand, 2nd floppy, printer and mouse. Fortunately monitor was working fine so I have dissassembled it just to retrobright it. Opening the case is quite easy but disassembling it fully is realy a mess. I let it go after refurbishing because it didn't have any retro-emotional value for me since in Europe they were not common as I was I child. I am mainly into Z80 devices. But I have photos that I had it once. :-)

@rogerw9840 3 года назад

Shouldn't be too hard to put that CRT in the other case. Some stand-offs and longer screws should do the trick. :)

@fetus2280 3 года назад

My 2c is Still Creamy White .. guess whomever had it before me loved it and kept it in the Boxes it came in .. I still have all of it and its Mint, even the Stand .. albeit the RF jack needs a new soldiering as its loose but thats normal for those things . I keep mine out of sunlight so it doesnt go yellow and gross .

@twocvbloke 3 года назад

The Torch brand monitor with Sony guts that I have had a similar diode fall apart in the same manner as the ones on that bridge rectifier, those style diodes seem pretty weak structurally, all I did was lift one leg for testing out of circuit (which it was fine), but putting it back, the other side snapped... :(

@solarbirdyz 3 года назад

I had a treadmill power supply lose diodes that way from a really bad power surge. Seriously, just vaporised. Also exploded a couple of other components, but not as completely. The difference was that it was more obvious - I replaced everything obviously damaged, and it worked. This looks even worse - I mean, it made it past the PSU - which ... is not high on the list of things I thought I would see on your channel! xD

@JessicaFEREM 3 года назад

I had the chance to buy one years ago at a thrift store, with the whole set of apple 2 c with the monitor and metal stand. I feel so dumb for not getting it, but the apple was in pretty Dior shape with missing keys and stuff

@canadianman000 3 года назад

I would say B+ is 0V and B- is negative voltage. I've seen this done with a lot of tube amps. Seeburg amps run 0V anode and -365V cathode to the output tubes.

@SudosFTW 3 года назад

camneerG was a Mac Plus Webserver that had a green CRT installed but something was reinstalled wrong and the picture was backwards. used to be listed on the Old Apple Webserver Directory.

@robot797 3 года назад

apple on a green crt is AWSOME!!!!

@jjohnson71958 3 года назад

yes you can fix it adrian black i have faith in you

@Eos_Galvus 3 года назад

I just gasped _audibly_ seeing the formfactor. I used a color variant in my elementary school as a wee little monster and I really miss the Apple II. Glorious.

@fluffycritter 3 года назад

That green Mac screen at the end makes me envision some alternate-reality casing for the Mac and screen which looks more like a IIc, or maybe even a II+ or a Commodore PET.

@organiccold 3 года назад

Adrian you can always creat some spacers and mount the crt in macintosh

@Renville80 3 года назад

Something like that would give me fits too. A shame really, as that would definitely be a handy compact monitor. If the screw holes for the Macintosh and //c CRTs sit in the same vertical plane, what about seeing if spacers can be 3D printed? Then just find a longer screw to bolt it into the Macintosh case…

@d.r.1402 3 года назад

An early preview of things to come with Apple and right to repair.

@starsundsternchen802 3 года назад

9:12 "Schmutz". I like you using german word!

@larryk731 3 года назад

More likely Yiddish

@kaitlyn__L 3 года назад

@@larryk731 common ancestry and etymology. “Smut” is also related to schmutz, via Middle English “smutten” (I did have to look up the intermediate word, but knew the rest).

@colinstu 3 года назад

it's a pretty common loanword into english.

@Unchained_Alice 3 года назад

@@larryk731 Yiddish is a Germanic language so will have some words similar/the same. Schmutz is German for dirt and I think in Yiddish it is very similar. English is also a Germanic language which is why German is probably the easiest language to learn once you master the Grammar and is why so many words are similar. Though Yiddish is much closer to standard German than English is. I speak some German but not Yiddish. I just know it is a similar language.

@rtechlab6254 3 года назад

Pinout is a small part of transistor specs, you need to match other parameters especially gain

@mrnmrn1 3 года назад

Gain is the one of the least significant parameters in a pass/shunt transistor. But the TO-126 transistor he put in place of the original TO-220 definitely has lower Pd and probably lower Ic as well, which is both a big problem.

@artstrutzenberg7197 3 года назад

Any thoughts on retrofitting/ "refactoring" that monitor case and that mac classic board to fit in a IIc chassis?

@CDE.Hacker 3 года назад

You said it, you need to "pop-a-cap" in that monitor.

@vbphil 3 года назад

That's right, the O.G. A.B. poppin' caps like you wouldn't believe.

@GarthBeagle 3 года назад

Hey Adrian, I keep meaning to ask - is that light grey power cord you're using one from an Apple G4 PowerMac or Xserve? I have a couple just like it, and find them to be extremely useful as they're really long, bend well, and aren't getting tacky (where the rubber casing is degrading).

@GeekmanCA 3 года назад

We used Xserves in our racks for years. The Xserves are long gone but those fantastic power cords remain in use.

@3vi1J 3 года назад

"This is the least user serviceable..." Good to know Apple's remained consistent.

@GummyGruffi 3 года назад

Apple: Nightmare for repair circa 1980. Nice to see some things are constant in our tumultuous world.

@scottlarson1548 3 года назад

Sometimes when you see stuff with blown up parts but a good fuse, it's because someone has replaced the fuse because that was the easy and obvious thing when they opened it up. It's possible that's what happened here.

@McTroyd 3 года назад

Plastic standoffs to mount the monitor to the Mac case, maybe? You'd need longer screws, but if the sizing is otherwise correct, that could work.

@MrFixiit 3 года назад

cant you cut the band with a dremmel cutting disk make 2 90 degree bends in the strap drill 2 holes into the band flip it ipside down then and put a small thin bold through the holes to tighten it up ?

@jb2590 3 года назад

8-Bit guy also had issues with those same diodes in old apple CRT's on his last episode. Those diodes seem like a common point of failure.

@FirstWizardZorander 3 года назад

Regarding the mounting tab mismatch, is it possible to flip the deflection yoke 180 degrees also?

@Zahgurym 3 года назад

I have one of these with a white CRT. The annoying bit is the pictures on Ebay were of a green monochrome. Paid over $300 for a complete IIc setup and got the wrong CRT and the IIc arrived dead.(bad ram)...

@francistaylor1822 Год назад

Ive got a IIc monitor here, just cleaned up. If it fails im going to pull the guts out and put a lcd in there

@RossTheGenMan 3 года назад

if the mounting ears are too far back you could probably rig it into a mac with some kinda spacers or shims

@kaitlyn__L 3 года назад

He was talking about putting the Macintosh CRT into the IIc monitor casing, not the other way around, which would indeed just need extra spacing. Edit; I should have waited until the end!