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Most Sonnet upgrades are pretty bulletproof (well at least, they were at release but nowadays some are failing with flaky cache but not a common problem), the problem likely lies with your 8100 ... reset PRAM, check PSU voltages, clean all connectors.

Nice fine I'd keep the accelerator you'll never get it again cheap. With this in the Iici it also makes quite a formidable Mac OS 6/7/8 machine.

It just takes one "collector" to infer that an early Mac is more sought after from date codes to artificially inflate their asking price. Other collectors read this then also believe they're on a gold mine as word gets around. I've seen this a lot lately especially on social media. Frankly...

It was Apple’s workhorse dot matrix and over engineered for reliability. They are the cockroaches of printing equipment, much like commercial dot matrix printers that are still used today. I still have the sound of an IW II screeching at 3am stuck in my mind printing off high school assignments...

The Quadra PSU is pretty robust, crack it open and have a look. If never opened it will probably be caked with dust. Suspect the issue won't be leaking caps but another component like a voltage regulator. I don't think they used a paper style RIFA cap was more polypropolene by thie stage.

Don't trust the external jumper block on the enclosure to set SCSI ID, disconnect this and set the SCSI ID on the drive itself to say ID 2 or 3 to be safe. You can also self-terminate the drives without need for the block style external terminator. Usually easy to find the jumper settings...

@evanboonie such nice research, thanks for posting it up. Hoping to explore my P100 card soon and will try a 133Mhz overclock as initial test. How did you desolder the CPU, was this a relatively easy job with the right tools or manage to become tricky?

Not sure if you're serious, but give it some time? There are some pretty amazing new developments in all aspects of vintage computing but nobody is in a hurry.

No, if NOS check for bent pins and any corrosion, the 25Mhz parts should run fine at 33Mhz, while the 33Mhz probably hit the wall with varying success @ 40Mhz.

I'm going in to do same with an SE/30 with jumpy/jittery video (all other avenues exhausted), do you think the BU406D you bought was just a better quality version? I've a pack of ?? unknown BU406 and reckon they might be super cheap.

Think it’s Apple Portrait to Apple Nubus video card with Portrait monitor connector

Hi Gerry, I think you need to break down your Mac issues into digestible portions - you’ve a combination of hardware, software, networking issues and more. Could I suggest making each Mac functional standalone before networking and trying unsupported software. Mac OS 9.2.2 is only really...

Nice one! If a really old SCSI drive you might be able to lubricate the bearing not from inside but outside the bottom of the drive - might be visible

Welcome MontanaMac, I've had many early SCSI HDs die hard after years of inactivity (even if they were good for a short moment). Often they can't come back but search for the HD model and you might find a fix as luRaichu noted usually requiring you to open the enclosure and tape back, remove...

The ISA slots are a nice inclusion but fitting anything in there is quite the design flaw! I'd look out for a ISA riser card from a 386, 486 slimline case (with 90 degree slots) that allows you to fit a card in upside down, so to speak. Other option would be a really low profile network or...

Hi Snial, Up next I'd try the patched version of Mac OS 9.2.2 that enables booting on unsupported Macs. Try booting the CD image from a FW drive as an alternative. JB

That's a lot of bloody caps

That's awesome, thanks for designing and sharing. A job I'm not looking forward to one day, so far my TAM sub works fine without issue.

I'd have a look around for the machine-specific eMac OS 9.2.1/2 installer media, along with reset PRAM/NVRAM and maybe an Open Firmware patch to trick the CPU speed as a last resort.

The tape looks quite freshly applied; if old and cloth it'd be either dried up leaving dry marks peeled up or super tacky depending storage - what do you think?