Posts tagged "Repairs"
The catch-all category for each repair job.
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Junior Senior, Can't Defeat
Everyone gets everything they want. I wanted the cheapest Atari 2600 Jr on eBay, and for my sins, they sold me one. Brought it to my front door like parcel delivery. It was a real choice console, and when it was over, I still wanted a couple more.
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A PC-6001mkII keyboard replacement
My NEC PC-6001mkII has a very spotty keyboard. The captive-dome switches inside are too corroded or dirty to work properly, a common affliction of the model. Luckily, honet, a hobbyist in Japan, has produced a replacement PCB for the PC-6001mkII keyboard named P6KBPCB. I finally got my hands on one, and I’m going to install it.
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A Backup Papicom
When you love a computer, sometimes you have to buy a second one of that computer, especially if it’s cheap. My justification? I wanted a good sacrificial test platform on which to do a bunch of internal PC-6001 mods, and I didn’t want to worry about frying my beloved first PC-6001. So, of course what I did was: pick up one that’s in better condition than my “good” one.
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Turbo Typin'
Times are tough for the Sharp X1turbo community. While keyboards used to be thriving in the used market, nowadays whole families of hungry junk hoarders can go years without a single ping on their Yahoo! Auctions watch lists. We gotta do what we can to save the keyboards that we have.
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MZasters of the Universe
This poor Japanese Z80 computer is literally screaming out for someone to come and fix it. With the some troubleshooting and a little luck, I got it back on the open seas and pumping out its fantastic chunky colour graphics once again.
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Pretty Eight Machine
I got a really good deal on a Fujitsu FM-8, the big, brown predecessor of the FM-7. Of course, it’s missing a few parts. Follow along with me as I get acquainted with an earlier version of Fujitsu’s dual-processor wonder computer.
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Flat Panels Aren't MultiSync 3D
While I adore my NEC PC-TV151, there is one monitor that NEC shipped to our shores that may be the ultimate CRT. This one was cheap, and this one is also very, very sick. Can I cure it so that I can enjoy CGA the way it was meant to be?
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Stand for the National CF-2700 Anthem
When you impulse-bid on a lot of five MSX1s, you don’t expect to find a new favourite system. As soon as this thing arrived, I fell in love with it at first sight. Panasonic knocked it out of the park with the design of this surprisingly heavy CF-2700. It looks like an executive telephone from Blade Runner. But: there’s a crack in it.
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Big Blue vs. The Tandy 1000SX
Thanks to the incredible kindness of another Tandy nerd, I’ve gotten a replacement Light Blue chip, but will the Tandy 1000SX finally work properly? Let’s ask the four years that I spent trying to figure out what else was wrong with it.
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The Bare NESessities
The Nintendo NES has more than its fair share of Achilles’ heels, but the motherboard is not usually one of them. Even so, there’s an open-source replacement motherboard for the system. Blog superfriend Keegs constructed one, but it’s not quite working. Let’s figure out what’s going on and take a look at the unique features of this new board.
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NEC's Apple Clone
You really shouldn’t go poking around on eBay when you don’t have something you’re looking for. How many times has this happened to you? I saw this monitor, the shipping price was reasonable, and I made a low-ball offer. The seller immediately accepted that offer without hesitation (uh-oh) and now I have a new monochrome composite CRT to fix.
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No Highs? No Lows? Must've Decomposed
My friend issued me a 90s Bose AWR1-1W Wave Radio clock radio to repair, with some sentimental value. For those who are unable to rock, we solder you.
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Why, you three-bit machine...
My NEC PC-6601SR “Mr.PC” has been a nearly permanent resident of my desk ever since it was repaired. This beautiful red computer works okay with a regular old VGA LCD monitor. So why did I pay a fortune to import a CRT monitor from Japan? There are two reasons. For one, it is the NEC PC-TV151 monitor that’s supposed to go with this computer. Also, it’s broken.
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Pippin in My Orchard
One of my white whales finally came up for a price that I could justify. Let’s see just how wounded it is, and then welcome it home with a little bit of help from some smart friends.
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You Might Have To Tomy Twice
I always wanted to try out a Tomy Tutor, and so I assumed that the Pyuuta was an identical computer. After all, it looks the same! This was one of those machines that I bought without knowing the details. All I knew is that Mandarake wanted an absolute fortune for any boxed Pyuuta games they had on the shelf, and that a good number of the retro-y Japanese Twitter folks seemed to have fond memories of the purple wedge. Let’s find out why.
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Columns Me Maybe
I love Columns. I love its creepy music, I love its chunky gameplay, and I love the way that it invariably hands me my own ass within a few minutes of playing. I also love using it to test suspicious Genesis consoles. Is it possible that one could acquire the power of Columns in a more inconvenient format?
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The Floppy Flops (Travelling to Tokio, Part 2)
In the previous part of my adventure with the 386-based NEC PC-9801RA2, we covered the existence of Artdink’s game Tokio, talked briefly about clone PC-98s, bought two computers, and built a replacement power supply PCB for one of them. That was a lot of work! So now we finally get to play the game, right? Right?!
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Amped Up For Artdink (Travelling to Tokio, Part 1)
Despite not being able to understand more than preschool-level written Japanese, I decided to get in on the “importing games from Japan” craze. Of course, I jumped in at the deep end and decided to pick up an Artdink-made city simulator with lots of cultural and regional in-jokes. Also, the city is in space. Did I mention that my PC-9821Ap2 can’t run it?
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The Case of the Dead Mini5SX
In order to get a copy of Tetris for the NEC mini5 series of word processors, I had to buy it along with a whole word processor set from the previous owner. This LCD-based mini5SX is sleek, attractive, surprisingly heavy, and broken. Very, very broken. Let’s see if we can fix up this grey beast, and dump its ROMs.
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Mini5 Word Crusher
Used Japanese word processors have been a tempting siren for me for years, but I’ve avoided them so far due to the huge shipping weight and my general illiteracy in the language. What if those word processors could run CP/M and had a CRT? Ah, now that’s a different story.
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Bad video RAM had Sanyo seeing red
My PC-incompatible Sanyo MBC-555 is now working, although it still looks like it fell out of a garbage disposal. Beyond its nasty exterior appearance, the video output isn’t particularly good either. There’s red garbage all over the screen. I decided to tackle this problem first, before getting my hands, face, cat, and desk sticky with epoxy.
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Another try at fixing the Magic Smoke SE
A few years ago, I got the “Magic Smoke” Macintosh SE. It was a pretty rusty machine, but otherwise looked okay inside. However, when I plugged it in after a (very) cursory inspection, it made ugly noises, failed to start, and then spat out a little bit of magic smoke – hence the name. Ever since then, it’s been a really small piece of furniture. I’m going to rip it apart and fix it.
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Call In The PROs When You Can't Flop (X68000 PRO Part 3)
With a new power supply and the entire insect population of Honshu removed from its case, the swamp-bogged X68000 PRO can finally start up, but can it boot floppy disks? In this exciting conclusion to the series, we’ll jump through a frankly ridiculous number of hoops – many of them ultimately proving to be unnecessary – in order to make some disks and find out.
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Call In The PROs When You Need Power (X68000 PRO Part 2)
Now that I had a reasonably clean X68000 PRO to work from, I set about restoring power. Rather than doing things the cheap way and strapping up my Meanwell four-voltage test supply, I decided to go whole hog and lay out a brand-new power supply PCB.
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Call In The PROs When It Gets Dirty (X68000 PRO Part 1)
What happens when you bid on a Sharp X68000 PRO without looking too closely at the photos? For one thing, you win the auction. What also happens is that the computer spends a while in your garage, waiting for all of its little tenants to be vacuumed out.
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Raising the PC-8801MH
Hirofumi Iwasaki’s book on PC-8801FH/MH repair says that the head loading solenoid is so loud that you should be careful using the computer in an apartment at night, lest the neighbours complain. I am not hearing that, or any other noises from the floppy drives. Let’s investigate.
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A Timex-Sinclair 1000 learns to love again
The fellow who sold me the Macintosh LC520 back in 2018 had another listing, a $10 Timex-Sinclair 1000 that needed some work. I decided I’d pop out and go grab it, and see if I can make the machine more reliable than Sir Clive did.
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MC-10 Hammered
Radio Shack worked hard to get their machines into every possible price tier of the home computer market, so what happened when they went super-budget? Nothing good. Thanks to hard-working community members, this unloved 6803-based computer has gone from doorstop to delight, so it’s high time that I picked one up. Of course, by law, any computer I pick up has to be at least a little broken.
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Can't keep The Most Useless MSX down
Even after I got it to boot by replacing the video chip, the Casio PV-7 MSX1 still had a bunch of problems. Top of mind were the broken keyboard and the corroded power jack. Let’s fix these issues too, so we can get back to enjoying this el-cheapo computer and the free programs on offer in the manual.
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TI-83 Plus One More
Although it may not be considered an “old” computer, a TI-83+ from the futuristic year of 1999 has a lot of appeal. It’s got a Z80, it runs a BASIC interpreter with machine-language program support, and lots of fun homemade games were built for it over the years. There’s also the small matter of me wanting a desk calculator with which to do binary/hex conversions, so I picked up this broken one to attempt to nurse it back to health. Will my efforts add up to a working calculator?
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Look, mom! X1's on TV!
One of the coolest selling points of the Sharp X1turbo is the built-in “telopper” board. With this board, you can superimpose computer graphics on live TV, and smear dithered-colour games across my tiny Sony CRT. Guess which of the two I’m planning on using it for?
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That name again is Mr.PC
Get ready to step into the cyberpunk future of the mid-late 1980s, and don’t forget to bring your boxed wine. NEC pulled out all the stops on this, their final PC-6001 computer. I have to pull out even more stops to get the disk drive to work.
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Mega Driving on the Wrong Side of the Road
You wouldn’t think it’s hard or expensive to find a Model 2 Genesis, but apparently in Japan it is both. I’d been looking for one of these for a while, and finally got just the right (cheap) console. Let’s explore some Japanese Mega Drive games with it.
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Modding a PlayStation (Eventually)
I’m a little late to the whole PlayStation ownership game, but what better way to start than by attempting a modchip install? This one had some twists and turns, but ultimately ends up with me being able to play A-Train in blurry composite video.
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In Need of Adult Supervision
If you read a lot of gaming magazines in the early 90s, you might remember being confused about some crude ads for this handheld game system. For everyone else, there’s a pretty decent repair in this one.
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Sharp invites you to enter the Turbo Zone
Before the X68000, Sharp had a Z80-based 8-bit personal computer that tried valiantly to compete with the PC-88 and MSX. Actually, they had a couple, but the one that I’m most interested in is the Sharp X1. It combines flash VCR-esque styling, sturdy construction, decent graphics capabilities, and AY-3-8910 sound. What more could you want? Well, you could put the word “turbo” on the front.
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Unleashing the Power of the X68000 ACE
You might recall that I own a Sharp X68000 ACE, the world-beating, sprite-spitting computer of everyone’s dreams. So far, though, the ownership experience hasn’t been the most fun I’ve ever had. Repairing the battery damage in mine has been challenging, as the damage goes deeper than I first thought, but I have accomplished one thing so far: installing a more reliable power supply.
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Mark III To The Future
On my latest jaunt to the wild world of Japanese auctions, I found this Sega Mark III that nobody else seemed to love as I got it for only ¥1100. Once it arrived at my home, I realized why. A Sega that can’t play games is too sad for words, so let’s get the thing up and running again.
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Recapping a Sequel
With all this discussion of budget Japanese computers and video game consoles lately, it’s easy to forget that I still like old Macs. This Classic II was picked up years ago, and it’s been on the shelf ever since I got it home and spotted the telltale sign of Simasimac. Now that I actually know how to fix it, let’s try to fix it.
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Reviving a Game Gear
With the recent success of the PC-9801NS/T capacitor replacement, I had chip-electrolytic capacitors on the brain. And like I said in this article, the easiest place to find more of those leaky little rectangles in my house was in the Game Gear I hadn’t bothered to repair for years.
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The Most Useless MSX
One of the more unloved MSX1s is the Casio PV-7. This poor little 8-bit computer was saddled with a crappy keyboard, only 8kB of RAM, no printer port, no built-in tape interface, and only a single cartridge slot. And that cartridge slot doesn’t even follow the MSX standard!
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Ms. PC-9801 if you're NS/T
I got ahold of a PC-98 laptop. Unfortunately, it has a lot of battery leakage and won’t power on. Come hang out and smell the vinegar with me for a little while.
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Space Walking with Gemini
While a ColecoVision is sometimes pricey and hard to find in my area, the much more rare Coleco Gemini fell into my lap while looking through my favourite flea-market junk bin. Because the machine came without cables, a power adapter, or joysticks, it had been relegated to the sad little corner where unloved consoles go, right next to a stripped-for-parts Intellivision II and a battered-looking 2600 Jr. Let’s see if it can be coerced to once again play Combat.
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The Sega SC-3000 goes to a key party
I fixed up my SC-3000’s cartridge slot almost a year ago, but I haven’t been using the computer. Why not? Because the keyboard is super unusable. It’s time to fix it now, though, because I just paid a king’s ransom for a copy of Flicky.
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Attempting CoCo 'brane surgery
Without a working keyboard, the CoCo that I’ve been working on over the past few months might as well be a fancy desk ornament. When I took a look at the keyboard last time, the membrane had some pretty serious damage to its carbon conductive traces. Before spending money to replace the keyboard, I’m first going to try and fix those traces with the conductive paint I already paid for.
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Hearing the PC-6001 out
When I first set up the PC-6001, I had to bring it back to life by replacing the shorted tantalum capacitors on the motherboard’s power rails. It’s such a great little machine! After some more testing, however, it became obvious that I was getting no sound out of the poor little thing.
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Fixing the Bad ADB Mac LC's power supply
Now that I know that the computer wasn’t horribly killed by my recap job and repair of all those broken traces in the ADB input system, let’s take a brief moment to recap that original Astec power supply from the “bad” LC. And fix the video!
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Recapping a Macintosh LC TDK power supply
While I was working on the bad ADB Mac LC, I tested it by using the “good” power supply from my childhood Mac LC. How good was that “good” power supply, though? Well, it smelled a little fishy.
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Cleaning the keyboard on the PC-6001
When I first fixed the PC-6001, there were a few sticky keys on the keyboard. “H,” Left Shift, and - most importantly - Return were all bad to a certain extent. I could limp along with Ctrl-M for a little while to replace Return, but it was pretty awkward. How hard can it be to clean the keyboard?
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A "Practice" Mac LC
My first real computer was a Macintosh LC. They’re not held in especially high esteem, and they haven’t been redeemed by history, either. It’s not hard to see why: a pitifully low RAM limit (10MB) introduced alongside a more RAM-hungry System 7, generally poor performance across the board, and cheap components. I still have mine, but this isn’t it.
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A literal Trash-80
The internet is both really good and really, really bad for my hobby. On the one hand, it lets me buy cheap broken computers and shows me how other people fix them. On the other hand, sometimes people offer me machines and then I take them.
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The PC-8801MH's gross keyboard gets cleaned
I finally got a keyboard for my PC-8801MH (I was on the verge of making one myself), and had to settle for a very dirty one as prices are just a hair shy of ridiculous. Even though I was primed by the pictures, I was shocked by just how disgusting the keyboard for the MH was when it arrived.
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A headache from a Sega Nomad
The Sega Nomad. A tiny Genesis you can take on the go, and have access to Phantasy Star IV and Gunstar Heroes on the bus. While that may not seem impressive now, in this age of smartphones that can cure cancer and cause depression, I desperately wanted one when it was new. Ten years ago, I was finally able to get mine. Unfortunately, because I am really cheap, I picked one that was, as the French say, “a little bit broken.”
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The PC-8801MH gets its battery removed just in time
I’ve had the PC-8801MH for awhile, but haven’t even bothered to get it open. It was only this morning, when I looked over my pickle jar full of removed clock batteries, that I realized I probably hadn’t removed the clock battery from it - and hadn’t done the SR either. No time like the present!
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I get the ol' Rusty WonderSwans
Pop quiz: what do you get for 221 yen? If you answered “nothing but problems,” you’re correct. What kind of problems? Two WonderSwans, at the same time? Now how can that be a problem?
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Repairing the power button on a WonderSwan Colour
When I made a trip to Japan recently, one of the things I was looking for was a Bandai WonderSwan Color. I’d had a black and white one previously, but the colour version can run so many more games. Games I can’t understand, but it’s most of the way there.
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Foiled again by the Tandy 1000SX
We fixed the 1000SX’s power supply, and tested the motherboard for shorts. There’s nothing left to do but put the computer back together again and see if it works. And take it apart again. And to wish I had a fully-operational chip fab and precision schematics of every custom IC. Yeah, this one is gonna take a little more time.
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Making my SC-3000 become a useful member of society
I was disappointed to find out that my “not working” Sega SC-3000 was in fact not working. However, I had a hunch that it was a common flaw: cold solder joints on the cartridge slot. It also has a more subtle flaw: it smells kind of bad.
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The circle of life - an NEC PC-6001 arrives, breaks, is fixed
Sure, I’ve got NEC PC-88s, I’ve got NEC PC-98s, but didn’t NEC make anything that was a little friendlier to the home user? By now, you should know better than to doubt our friends at the Electric Company. The NEC PC-6001 has a thriving homebrew scene around it in Japan to this very day, and is still fondly remembered. Let’s rip one open and stuff it with hot molten lead.
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Tandy 1000SX power supply is back from the dead
When we last encountered the Tandy 1000SX, it decided to bravely blow itself up rather than face us in battle. With a lot of elbow grease and a little bit of solder-slinging, this testament to 80s shopping-mall computing will live again.
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Will It Short? A Tandy 1000SX motherboard inspection
Last time on the Tandy 1000SX show, I blew a hole in a power-supply capacitor without even getting the machine to boot. Talk about ungrateful! At least it gives me an excuse to buy more tools.
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VA2 "for parts" Genesis fixed
The more questionable of the three “for parts” Sega Genesises I traded for in the previous entry is now fixed. It didn’t take too much effort - just some attention to detail, a few games of Columns, one cheap spare part, and a soldering iron.
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Mini updates 3 - PC98 A-Train III, Atari ST keyboard fix, FM-7 video adapter
Some more mini updates for things that weren’t big enough to merit a full update on their own. In this entry, we’ll finally get A-Train III running on my PC98, fix an Atari ST keyboard, and ship new hardware for a whole new brand of Japanese 8-bit computer.
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Fixing the HB-101's keyboard
When I first got the HB-101, its combination of small RAM and lack of any way to get software on it was a problem, sure. There was a bigger problem waiting, though: the grim spectre of an inconsistent keyboard.
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Guest Project - a Model M refresh
A few years ago, my friend Grant completed a refresh of one of his Model M keyboards (I know, right?) Here’s his writeup on the process.
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Atari 1040STF mouse repair
I popped open my “good” Atari ST today. As you might remember, I have two 1040STFs: a very battered one I got from a flea market, and a nice-condition one that was owned by a guy who really cared about it, but had passed away. The only thing that was really wrong with this machine is that the mouse didn’t work.
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Apple IIe keyboard repair attempt
I’ve had my Apple IIe for a few months now, and it’s been great. One of the things that’s kept it from getting more use has been the spotty “I” key, which the seller warned me about.
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SGI Octane runs again
Many years ago, I grabbed an SGI Octane off eBay from a junk dealer. They didn’t pack it well, so the machine arrived beat up and stuffed full of styrofoam fragments from the packing material it had shredded on the way. After a few attempts to lug the machine around in the small condo I had at the time, I gave up and just let it slowly be re-absorbed into the pile of non-working computers.
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PC-8801mkII battery removal
I delved into the depths of my trusty Showa-era NEC to remove its leaking (leaked?) battery. Here’s what I found.
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Removing the battery from a Macintosh TV
The Mac TV is a machine that I’ve had for awhile. It’s a much better TV than a computer (the board is unusually limited, even for a Performa, and has almost no possible upgrades beyond what the computer already has), so it has been in storage for quite some time.
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C64 keyboard fixed
The replacement keys for my battered C64 arrived from Retroleum. It took a bit longer than I expected, but then again the postage was ridiculously cheap and it wasn’t like I was biting my nails waiting to play with the C64 I’ve had on the pile for a few weeks now. I’ll definitely be back to get more parts from them.
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Reassembling the Amiga 2500, Part 3 - 5.25" Bay
Today was a good step forward. I finally got the case back onto the Amiga 2500, but there are still a lot of tasks left until the machine is really “ready” to be tucked away on my desk.
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Reassembling the Amiga 2500, Part 2 - flickerFixer
Now that work space is once again at a premium in my workshop, I find myself having to reassemble the diaspora of parts that were removed from my Amiga 2500 when it was dismantled to replace the 68000 socket.
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Super Famicom Repair-O-Rama!
I bought a large lot of Super Famicoms off of Japanese auction for cheap, and set about trying to repair them. Almost all of them had problems.
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Amiga 2500 keyboard refurb
The keyboard I got with my Amiga 2500 had:
- A broken right alt key,
- A spotty (at best) return key,
- And a numpad enter key that wouldn’t stay up, but did work,
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The Amiga 2500 lives! (on its original 68K)
I just got my A2500’s badly corroded CPU socket replaced with the help of my buddy and his employer’s substantial rework gear.
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Sega Genesis - corroded RAM trace
A Model 2 VA1.8 Sega Genesis purchased off eBay as non-working presented as non-working. After several days of diagnosis, tracing and research into the system, I finally figured out that the problem was the corroded trace I identified right off the bat.
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Experiments in booting the A2500
Threw a few more hours at the A2000 today, cleaning up here and there. I popped out the 68000, cleaned up the pins, and checked the socket. The socket wipers are immaculate, not a speck of corrosion or acid on them (I checked with a magnifying glass). The pins for the socket on the underside of the board are still nice and shiny, so I’m willing to say the socket is alright.
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Battery removal from the Amiga 2500
I’ve had this Amiga 2000 for several years, but it was only recently that I put in the effort to fix it. The big problem with these machines long-term is that the Varta clock batteries explode and corrode all the traces and sockets. Mine has a leaky battery for sure, so I hope I can save it.
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Starting on the Amiga 2500
A couple years ago, I traded some car parts to a friend for his dad’s old Amiga A3000 and A2500. I knew that clock batteries were going to be a threat on both of those, so I nobly waited a year to take apart and desolder the battery from the A3000. That was back in 2014.