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Based on period magazine ad pricing, I'd expect the 128MB (4x 32MB 72 pin SIMMs) ram upgrade to be in the US $4000-6000 range when the 840AV was shipping. By May 1996, RAM prices per MB had fallen significantly and you could outfit your 3 year old 840AV with the maximum 128MB for a whopping $2200.

Also, if the machine should take that opportunity to pack up and stop working, or a tab should break off the case, the seller may feel that it's your responsibility, whether justified or not. If they're comfortable opening it, ask them to do so for your inspection.

I know the Display Card 24AC supports 1024x768 at 60 and 75Hz and 24-bit colour depth, but I think that its sense coding scheme is incompatible with the more modern DDC used on your Studio display by default. Many of Apple's more modern monitors utilising the DA-15 connector and DDC have a way...

Macintosh Garden works quite well on my 68040 33MHz/Mac OS 7.6.1 in Netscape Communicator 4.08 with Java, JavaScript, style sheets, plugins, and images turned off in Prefs. Turning images off isn't a big deal because in Navigator 4.08, there's a load images button on the toolbar. If you decide...

There are eight surface mount capacitors on the Mac Classic logic board that will need to be replaced. By the time that sound goes wonky, usually all of them are leaking. There are seven 47uf 16v and one 1uf 16v caps on the board. They look like little silver round trash can lids and they...

The SCSI ID selector on the enclosure is attached to a set of leads that attach to SCSI ID jumpers on the drive. If those leads are not connected, the ID selector does nothing, and the drive's ID jumpers determine the ID. If you haven't changed the jumpers on the malfunctioning HD, it's...

I do know that the last time I had a board out to Charles (maccaps.com) he was based out of Southfield, MI. If I'm not mistaken, that's a Detroit suburb.

Xbench's RAM score is likely based on a test that performs poorly with smaller amounts of system RAM. If About This Mac-System Information says 3200, then that's how the memory controller is accessing the RAM. Memory bandwidth will be approximately 30% more with RAM operating at PC4200. Using...

I'm of the opinion that the new modules you have don't contain timings for PC4200. This is not the case with all PC6400 DDR2 RAM, as I have some that runs at 533MHz (4200) without a hitch. If you have a PC that uses DDR2 RAM, you could install some of these modules and run CPU-Z in Windows...

Do you still have the original RAM to check if it's running at the specified PC4200? With the new RAM, is it still clocked at PC3200 with only two sticks installed? ECC vs not shouldn't make any difference in from the rated timings. My guess is that the new RAM doesn't supply timings for...

The headphones could also be too low impedance for the amplifier in the SE. With my Sennheiser HD 595 headphones, (120 Ω) the volume scales normally and becomes "too loud" at about 7, but with earbuds, it's horrendously loud at minimum. It gets more distorted as I turn the volume up, but not...

Most of the Orange Pi boards with SATA don't have it implemented at the SoC level - They use a USB to SATA bridge, sometimes on the same hub as all of the USB ports and Ethernet. I encountered one that looked great: SATA and GbE, but looking at the block diagram, both were on a USB hub along...

Yes. The 550 has a LC PDS slot.

The Pi 3 and Pi Zero W both have integrated WiFi. With the right software configuration, one could have the Pi Zero W act as a "smart" WiFi dongle, where it takes care of connecting to WPA AES encrypted networks transparently to the Mac OS. It simply would appear as a USB Ethernet dongle to...

Will that 1600x1200 Dell scale 800x600 to fill the screen without interpolating it? That possibility has long intrigued me with 1600x1200 panels.

Did you try that old video on 68k hardware to ensure satisfactory playback? 320x240(ish) at 24fps and 24-bit colour may be pushing it. If you look at videos included with 68k educational software of the day, (Carmen San Diego, multimedia encyclopaedia, etc) it's often at a lower colour bit...

The Draw module in ClarisWorks is great for doing flow charts and various other diagrams too. In third grade, I remember my puzzled teacher asking why I was using Draw for the creative writing assignment instead of a word processor. When I showed her my ideas typed inside little boxes and how...

If you've done a major teardown and reassembly on the machine I wonder if there could be a loose connection to the front panel/power button PCB. The other thing that springs to mind is that almost any time I fully disassembled a G5, I had to do a CUDA/SMC (whatever name it went by at the time)...

I actually have a dual interface USB/SCSI Zip 250- which is what I thought the OP was talking about, but I see I missed the "Centronics" detail. My dual interface unit is just an external SCSI Zip 250 that came retail boxed with an Iomega USB "cable" that connects to the DB-25 on the drive...

In my experience, the later USB-only Zip drives (such as in the linked CNet article) are the only ones that can be bus powered. The SCSI/USB combo units required the power adapter, whether connected with SCSI or USB, as did the earlier USB-only units that have a power inlet. Essentially if a...