• Updated 2023-07-12: Hello, Guest! Welcome back, and be sure to check out this follow-up post about our outage a week or so ago.

My ongoing LC 475 restoration

Hollie

Well-known member
Hi guys, just wanted to show off my LC 475 and create the first of what will be many posts on restoring said machine.

Backstory: I found this poor machine amongst some rubbish on the side of the road about a week ago whilst I was out walking the dog. I'm assuming it was stuff from a recently-vacated house that was awaiting collection by the binmen. However, I first spotted what I later discovered was the remains of a Performa 6500/300 which got my interest; and then discovered the LC 475 with it. There was also a big box of floppy disks too, but that's a story for another day. Needless to say once I'd reached home, I swiftly returned with my car to collect the lot.

Sadly the Performa 6500/300 is beyond saving; the PSU is dead, most of the case panels are missing, and it's covered in rust. However the floppy drive was still present so I've kept that and will send the rest to recycling once the centre is open again, post-lockdown.

Under inspection of the LC 475, it appears to be complete. Physically it's pretty clean both inside and out. The barrel battery hadn't leaked (although was quickly disposed of). The big downside (although understandably) is that the previous owner has put a drill through the hard disk, but the chances of a 24 year old SCSI disk working was slim at best anyway. The big upside I can see so far is that the original 68LC040 CPU has gone and has been replaced with the 'full fat' 68040. 

LC475internal020420.jpg.4daaffebc6bbab224514aec8b3902fbc.jpg


My plan was to see if there were any signs of life; if there were then I had to save it, especially as it was free.

Powering it up; the fan spins and the floppy drive makes a noise, but that's it; there's no chime. Whilst I can't get a video output yet, I'm going to have to wait to see how bad it actually is before I can take the next steps. But it seems like the power supply is decent, it even managed to spin up the hard disk, damage and all.

I'm now waiting for various deliveries before I can move on with this, but should be a fun little project. My end goal is for it to be running 7.5.5 (unless someone can suggest something better) and for it to be set up for word processing amongst other things.

Done so far:

  • Replaced barrel battery with a new Varta
  • Binned HDD



To do list:

  • Obtain peripherals (ADB mouse and keyboard)
  • Obtain a converter to use it with a modern LCD of some description (I have a selection of different ones in the attic; one of them should work). Then test to see if there's any video output.
  • Find someone in the UK to recap it. I can solder but don't trust myself to do it on this level.
 

JRL

Well-known member
I posted on your Reddit post, but nice grab and welcome! You should save the cards and MB in the Performa though, based on the picture you posted it did look like it had some upgrades even if it isn't salvageable otherwise.

 
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Hollie

Well-known member
I posted on your Reddit post, but nice grab and welcome! You should save the cards and MB in the Performa though, based on the picture you posted it did look like it had some upgrades even if it isn't salvageable otherwise.


Thanks, admittedly I did spam Reddit a little too much. Was rather pleased with myself for finding this.

I have saved the logic board from the 6500/300, although I have absolutely no use for it and no way to test it right now.

 
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Hollie

Well-known member
Just in case anyone was interested; here's the logic board from the 6500/300. Actually in amazing condition considering the rest of the machine resembles rusty scrap.

2020-04-07_22_23_06.jpg

 

Hollie

Well-known member
Oooh, what's the Avid card in there?
Good question; here's a photo of the label. It's got S-Video and composite out ports on the back of it. It's also hooked up to a S-Video and RWY composite in board over that ribbon cable.

2020-04-07_22_37_07.jpg

 

cheesestraws

Well-known member
Yeah, that definitely all looks worth keeping.  The basis of a fun little future machine there, I suspect. :)   I wish people put things like that out for the binmen where I am!

 
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Hollie

Well-known member
Yeah, that definitely all looks worth keeping.  The basis of a fun little future machine there, I suspect. :)
Fair enough, I'll hang onto it just in case I can either find someone to test it, or I get lucky on eBay and obtain the matching machine. I wasn't looking for a PowerMac, but you never know. Let me get the LC 475 running first and then we'll see...  :p

 

cheesestraws

Well-known member
Yeah, stick it in a corner until you have time/resources to play with it :) .  If worst came to worst, though, I bet you could get it running off an ATX PSU or similar and mount it in an amusingly unsuitable case...

 

joshc

Well-known member
Yeah, stick it in a corner until you have time/resources to play with it :) .  If worst came to worst, though, I bet you could get it running off an ATX PSU or similar and mount it in an amusingly unsuitable case...
That might be the plan for my 8200/120 which has a dead PSU and I *hate* the 8200/8500 series case, it's just Spindler era plastic crap that breaks as soon as you look at it.

Good luck with this LC 475 - it's nice to see another one saved! The logicboard + PSU will need recapping.

 

Hollie

Well-known member
I bet you could get it running off an ATX PSU 
I wasn't planning to, but looked into this today for a laugh. The issue I've hit upon is that I can't find any sort of pinout diagrams for the power supply. There's a 4-pin Molex (that's obvious), a 14 pin, and a little ribbon cable which appears to have six wires going through it. If I could figure out what goes where, I reckon I could bodge something together to see if this board fires up.

 

cheesestraws

Well-known member
Hmmmmm.  I'd create a thread in the PCI PowerMacs forum and see if anyone else has one.  Someone might have worked it out!

 

Hollie

Well-known member
Time for an update.

No actual progress on the LC475 itself, however some of the fruits of my recent overspending on eBay have started coming in. I don't actually have any ADB peripherals, so reckoned I needed a mouse and keyboard. So instead of my idea of just spending a couple of quid to get some old mouse and keyboard; I ended up buying a new-in-box Macally keyboard; and a new-in-still-sealed-box Kensington Orbit trackball.

2020-04-10 00.34.24.jpg

Also who doesn't like new tantalums? I'm not in any position to actually recap the board myself, but it's good to be ready...

2020-04-10 01.00.32.jpg

 

Hollie

Well-known member
Actual progress has occurred!

The VGA adapter finally arrived today, so even though I know the machine is in bad shape; I optimistically hooked it up to the TV in the living room (it was closest) and through the very scientific process of flipping the dip-switches randomly until something happened; a picture eventually appeared.

It works! (sort of).

2020-04-11 17.22.39.jpg

At the moment I get the disk icon; which is understandable as I don't have a hard disk of any variety just yet. However, I dd'd a copy of the 7.0.1 boot disk to a floppy, and had mixed results from both floppy drives; neither of which was the machine booting from it. The original drive thinks about it for a few seconds, then ejects the disk (and I get the 'x' symbol), the drive from the Performa does roughly the same thing but a little quicker. So either I haven't written the disk correctly or there's a floppy related issue.

But I'm pleased. Might have to hurry up with the recap now to fix the rather line-y display.

 

Hollie

Well-known member
Try this one (7.5 Disk Tools)?  This is in a format that will work with dd.

View attachment 32640
Thanks, that was exactly what I needed!

PROGRESS REPORT TIME.

One of the things I ordered from eBay was a soldering kit (all of £20, bargain). I have done soldering in the past, just on electric guitar wiring that doesn't have to be that precise. A couple of nights back, in general lockdown boredom, I decided to test it out and practice, and ended up removing most of the components from the Performa's dead PSU.

The next night, also bored, I got brave.

Introducing the recap'd logic board from the LC 475. 

2020-04-12 02.24.33.jpg

Not bad for my first attempt, if I say so myself. Admittedly some of the joints wouldn't hold up to professional scrutiny, but everything's securely on there. And it still works.  :p

Did it make a blind bit of difference to the machine, however? Absolutely not. Still don't get the chime. I have a feeling that was all for nothing; none of the electrolytic caps had leaked or showed any signs of failure. I had a suspicion that it's been recapped in the past, however if it's true, it was done really really well.

Onto fighting with actually booting it.

Thanks to @cheesestraws , I finally got a boot disk that worked. After some trial and error, I found that the original floppy drive from the machine refused to read anything and the eject mechanism wasn't particularly happy, even after a good head cleaning with IPA. Luckily, my backup floppy drive (from that destroyed Performa) had no issues. It started out a bit noisy, but now has quieted down to reasonable levels (for a 90s floppy drive). The eject is also good and strong.

I had a hunt around in my attic and found a lovely early 2000s 17" Acer LCD in beige, which had no problems displaying a picture from the VGA adapter. Originally I had the line-y image that my TV also showed, but that was fixed by pressing the 'auto' button on the monitor and letting it sort itself out. Fixed. Now got a picture in a rather decadent 1024x768 resolution. Model number is AL1712, for reference.

2020-04-12 21.49.45.jpg

So that's it for now. Next step will be to sort out a hard disk (most likely a SCSI2SD, when funds allow) and get an OS on it properly.

 

Hollie

Well-known member
Nicely done!  I'm still trying to work up the courage to recap anything...

Perhaps an obvious question but: do you get any sound through the headphone jack?


I honestly worried about doing the recapping a lot more than I should have. I found the trick was just taking my time and thinking about what I was doing. I found that the most stressful part was removing the old capacitors. Putting on the new ones was easy; trim down the legs, and then hold them in place with blu-tack whilst I soldered them on. 

I honestly hadn't thought of trying the headphone jack! Plugged in some headphones and the chime is present  [:D]

 
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