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Check the output of the pass through port with a multimeter to see if power is getting there. If not, there’s a relay inside the PSU, usually an Omron part, looks like a rectangular box about 3 cm x 1 cm x 2 cm. Has four pins, one provides power to the passthrough port. Another is from the main...

There were different PSUs (and possibly revisions too). The list above was from a Sony PSU. I have done one M1297 and two M0401s. I just looked and found a cap list from one of the M0401s. Board B is different for the M0401. Board D looks the same. But the PSU was not a Sony and is different...

I also removed the boards. My LED came off rather easily as the plastic holder was cracked. I replaced the LED and hot glued it in place. Could have 3D printed a replacement holder but opted for the hot glue. If you running with only one card, you might get away with a Noctua but if you plan...

A bunch of us have rebuilt battery packs with new NiMH cells. I get two hours with mine. As @finkmac mentioned, you won’t be able to revive stock ones. For the rebuild, the main issue is finding a battery where the cells haven’t corroded the EMM circuit board and chip inside the battery. If that...

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Nice, have fun!

Not sure if you noted the cap specs in your monitor as you removed the old ones or whether you just used the list from TinkerDifferent. I found that list from TD had an error in it. I noted it here. You might want to check. Post in thread 'Wanted: Cap list for M1212 Macintosh Color Display'...

Yup. I had mixed results though.

I did a crystal change with the stock CPU. Been running great at 40 with no serial port issues.

You should be able to test the resistor. The yellow/black wires are to the fan. The thing you are referring to as glossy is just hot glue. There is a bunch in that area to hold the caps rigid as well as the fan wires.

Awesome! :)

Congrats! Lots of fun projects there.

Depending on what the OP wants, you could avoid the complexity and do something basic like have the extension attempt to ping a well known “Internet” service (e.g. Google’s DNS at 8.8.8.8) and just infer general public Internet connectivity if you can reach it.

No problem!

Quadra 700

Quadra 800 (System 7.6.1 .. overclocked to 40MHz) First one just after running the test. Second one with moving the mouse around while its running the tests.

Attempted to run the test on my Quadra 840AV but every time I launch the app, the whole system locks up. This machine is running System 7.6.1 and is a vanilla Quadra 840AV.

Quadra 950 (System 7.6.1) This first one is just running the test and that's it. This second one is moving the mouse around the entire time that the test is running.

Quadra 700 (System 7.6.1 .. has Bolle's quad doubler)

PowerBook 540c (System 7.6.1, overclocked to 40MHz and has full 040 with FPU)