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Sure, Do you want me to install them on your boards or do you want to attempt install yourself? PM me.

Yep, I actually got a dead IIcx board for the roms and used a FDHD SWIM from a MAC SE with an adapter.

Don't you have some on the other board or what?

Excellent! I’m happy there are more options on the market. This is my current version of my adapter: It will stay on the market as long as there is a market. I ended up beveling the edges to make it fit various PowerBooks a little better.

In case the problem actually is the board how you ever used one of these: Maybe comparing your board to a stock board with a huntron will yield some clues?

Looks a little high to me, perhaps some better thermal compound would help.

You should be able to use it without the rom card, just don't use the modified system rom. You can always email @bbraun.

This may be of some help: http://www.synack.net/~bbraun/classic2.html

You will use the 1996 disk, here is the read me I extracted: ¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥ READ ME ¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥¥ The February 1996 Macintosh Family Diagnostics Update Mailing includes separate CD's, diskettes, and User's Guides for MacTestª Pro for 680x0-based Macintosh...

Two cases I can think of where techstep has helped me: 1. Had a macii board that would intermittently sad Mac with no video, the techstep revealed it was failing cpu tests so I solved the problem by reseating the cpu. 2. Had a se/30 sad Mac but could not see the error code, I did a ram test...

I don't know that there is a rule against it. It's just my policy.

I don't like to shill, but they are on Ebay.

I stumbled across this: There is mention of a Maccat test. I wonder if it would shed light on anything by running tests similar to a techstep. I have a techstep (which obviously is not compatible with Portables) that has helped me fix a couple of other boards simply by elaborating on a sad...

21 ohms.

That's probably a fuseable resistor, did you check it with your meter?

Whats the resistance? Should be near 0.

Yeah F1 = Fuse 1

Near the battery power connector.

An expensive mistake, Did you check the fuse?    Then, you’ll need to check the mosfets: https://www.utm.edu/staff/leeb/mostest.htm

After researching a little more I wonder If the problem might be in this area?