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IME the ROM chips are fairly reliable and are unlikely to be the issue. If you've already recapped the board I would then focus on the RAM chips. Did you check to ensure the capacitor electrolytic didn't damage the logic board?

My technic is to use my Hakko desoldering gun to remove the bulk of the solder and then use hot air. When using the hot air I move it back and forth over all of the pins while lightly pushing down on the end pin where I currently have the hot air pointing. At some point the pin will push down...

Possibly. Which is why I am going to practice on a bad motherboard.

I have a logic board that I am going to practice removing 30 pin SIMM sockets as I think this would be a useful skill to have. I plan to use a Hakko to remove the bulk of the solder and then use hot air to remove the socket. This has worked well for removing 40 pin DIP chips so I don't see why...

@wrljet I think I am going to find a board with a broken SIMM socket and give my hand at trying to replace them. I have a Hakko desolder tool as well as hot air. Typically for things with a lot of pins I use the Hakko to remove the bulk of the solder and then use hot air to remove the actual...

Curious, how did you remove the old sockets? Hot air?

Since mine has an 80386-40 version I assume mine is a later version (though the board does support 25 and 33 MHz Intel versions). It's currently configured with 20MB and the specs say it supports 32MB. I think higher memory capacities are likely supported on "workstation" class desktops and...

Always got to be a few who take a post and pick it apart. It's not like it wouldn't be common sense to assume that any one person, or even every participant in this forum, would know of every single 80386 motherboard. That said I clarified the intent of the post so let's move on and operate...

Not looking for a definitive answer, just those motherboards people are aware of.

Just curious if anyone knows the maximum memory that was ever supported by an 80386 motherboard. I'm not asking about how much memory the 80386 could support but rather how much memory was ever actually supported. I have an 80386 system that supports a maximum of 32MB. Anyone know of a...

As with anything the answer is: It depends. What would be your interest in obtaining an 80386 based system today? A specific piece of older software which runs optimally on it? Nostalgia? Something else? I just purchased an 80386 DX system about a month ago (I purchase an 80386 SX system about...

That's awesome as it means Intel didn't test it. You have one of the earliest 80386 processors.

Does the processor have the ∑∑ on it?

Perhaps I missed something but in your OP what link are you referencing for the pictures?

Advent of Computing has a nice video on the 4004 and 8008: Episode 16 - 4004: The First Microprocessor Episode 21 - 8008: Intel's Second Shot I can't speak to the accuracy of what's presented (would be interested in hearing what other people think) but I thought it interesting.

I just purchased a computer with this system and had a question about processor configuration. I was able to obtain some information about it with the documentation here: TK TK83305-4N-D-03 Apparently it can use a solder on CPU (which mine has, an AMD 80386-40MHz) or an Intel 25/33MHz...

Not all IOU chips are socketed, I have a IIe board where the IOU is soldered. The IOU appears to generate the power on reset signal (my Apple IIe Reference Manual is fuzzy so it's difficult to read). The best way to troubleshoot the reset is to use a scope. Do you have access to one?

Well, he did qualify it with "necessary" caps replaced. He could argue none were necessary.

To clarify when you power up the system (with or without the card in post #3) it may or may not display a garbled screen? However each time you use the RESET key the system behaves as expected?

First remove all cards. Once done power up the system. Do you hear a beep? If so what happens when you press CTL-RESET? Do you see the Applesoft BASIC prompt?