Yes there it is

Posted 2022-12-02 | Back to blog index

Yes there it is! The Quadra 700 I won on Yahoo!Auctions when I put in what I thought was a low bid that would never win!

The front of a Quadra 700

Going to plug it in through, something seems off...

The rear of a Quadra 700, but the plastic around the row of ports and NuBus slots has been crudely hacked off and the ports don't line up

Wait... That doesn't look like the motherboard of a Quadra 700???

The inside of a Quadra 700 except the motherboard is different and there is a PCB connected via a flat flex cable just hanging in the breeze near the NuBus slots

Is that... a G3!?!?

A motherboard with a daughter card plugged in with a sticker that says Crescendo G3 250/512

As @RonsCompVids quickly figured out, it's a hackjob to fit a PowerMac 7100 into a Quadra 700 case! Upgraded to a PowerPC G3 processor...
Some had really fun building this thing!
The battery has been replaced at some point so it hasn't bombed (but reads 0V), but there is a lot of sadness around the capacitors.
The auction said the power LED turned on but I can't get it to do that (yes I used an ADB keyboard power button)…

[There was a photo of the logic board corrosion for that post but I appeared to have killed bitbang.social photo uploads with my nonstop posting as it will only fail with a 503 error now, so here's the caption only]
Photo caption: Close-up PowerMac 7100 motherboard with corrosion on the pins of the surface mount chips near some surface mount capacitors. Also visible is a CR2 3V Lithium 1/2AA barrel battery with Japanese print on it.

So I have new batteries on order as I believe the same as my IIcx the ADB boot circuit is actually powered by the clock battery (insane design).
If that doesn't work, it'll need a recap.
If that doesn't work due to the corrosion, I'll just repurpose the housing of this freak as a sick custom case for my Synology NAS, since I'm not exactly desecrating some precious virgin device here.

Here's that photo of the mobo corrosion around the leaky caps

Close-up PowerMac 7100 motherboard with corrosion on the pins of the surface mount chips near some surface mount capacitors. Also visible is a CR2 3V Lithium 1/2AA barrel battery with Japanese print on it.

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