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Pin 76 of U2 looks like it may be bridged to its neighbor. The circled areas have some pins that look tarnished. Have you already checked those areas closely?

There's not a lot of info on this card online, so here are some things I've learned about it that will hopefully be helpful to others. The OrangePC 290 is essentially a PC on a Nubus card, complete with a processor, memory, header for IO and a PCMCIA card cage on some configs for expansion...

No. The manual says just leave it disconnected. Does anyone here have tips about how to best construct a y-cable? I'm thinking of buying a premade HD26 cable and then splitting that off to the other DB15 cables, but not sure if I should splice in premade DB15 cables or just split off the HD26...

Thanks so much @Garrett !

Is there a pinout handy for the connector on the DOS Compatibility card found in the 6100 and other models? I found a post about it on 68kmla via google, but their site is down. From the google result it looks like there was a spreadsheet with the pinout somewhere.

To answer your question directly it's a Molex MiniFitJr 14-position, but that doesn't matter. Just get an ATX extension cable which will fit fine. You can trim it if you like or just let it hang over one end.

As a little follow up, the Cherry RR812C1000-116 DPST 16A 125V switch worked great. To get to the switch, remove 4x T15 security screws on the four corners of the rear housing. There should be just enough room to place it parallel to the rest of the enclosure. Note the placement of the switch...

Oof that sucks. I might epoxy in little coper pads for the NC pins to anchor the chip down and then bodge the rest with really thin (maybe 40AWG wire. It'll take a lot of time and patience and still look like a mess after though.

I recently found a cheap (~$200) Metcal MX-5200 on eBay listed as powering on but otherwise untested. When powered up with good hand pieces connected it would display "Open Error" on the left channel. Opening it up revealed loose screws and nuts from the LCD panel, likely because someone tried...

It’s a big glass vase.

Here's one more. I keep a mass grave of pulled capacitors, batteries and other bits and bobs from the things I repair.

Hopefully a square is acceptable. This is an original Macintosh dealer sign I picked up this year with a custom base with LED strip I made for it.

Here’s some info about the connectors They’re Molex 2.36mm Diameter Standard .093" A premade pigtail would save you the hassle and expense of crimping your own. This one is just an example. There are a bunch of different length options. Model: 2162911042 View Product Otherwise you could get...

While using a Duo MiniDock, the familiar fishy smell of bad capacitors started filling the air. I took apart the dock and was surprised to see 4 large electrolytic caps inside. I wasn't able to find these documented anywhere online so here you go... 2x 100uF/35V 2x 330uF/16V All are abut...

Now on to the enclosure and frame. You can see from the photos below the rust was quite bad. I used wire brushes on a drill and sand paper to get most of the rust off and sprayed all affected areas with rust-converting spray paint, leaving key areas uncoated to maintain ground. The CD ROM bezel...

The 120uF cap on the secondary side of the PSU had leaked and was way out of spec. The others tested okay but I replaced those I had in stock, ignoring the bulk caps and the tiny caps on the main PCB as well as a couple on a daughter board. Here's a reference in case it's helpful to others. I...

After fixing the first mildly-bombed Quadra 650 I took a shot at repairing the second much worse board. This one had rusted RAM sockets and corrosion on all of the SMD RAM and nearby components. Somehow the reset/interupt buttons and nearby components on the other side of the board were also...

Congrats @Mac84 ! Also, I'm working on a second board. Here's a shot with a lot of stuff in the affected area removed in case it's a helpful reference for others who want a map for continuity testing in that area.

Update: TattleTech recognizes it as a Quadra 650, even though the OS does not. ¯\(ツ)/¯

Inspired by @Mac84 's recent stream working on a battery bombed Quadra 650, I decided to try to repair one of mine. This board wasn't too bad, but the battery holder fell off, one of the battery diodes fell off and surrounding areas were rusted. The tops of the RAM pins were rusty too. Not just...