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Ah, in my case it turned out to be the ROM. I tried a ROM-inator II from BMWOW and it's working now. So now the question is: Is it possible to repair the bad ROM? How do I go about troubleshooting it? I don't see any replacement Mac IIfx ROMs available anywhere but I'm interested in restoring...

Great guide! Thanks for this, I love the old powerbooks. I have a growing collection of 100-series PBs with bad plastics... What epoxy did you use, specifically? How is it holding up now (a few days?) after the repair?

Any update on this? I have the same issue with a Mac IIfx.

That is not a normal chime. I admit I started laughing about 5 seconds into it... "comedically long" is accurate. I think you may have a bad ROM.

I have read that nothing can be done as this usually means the LCD panel itself is delaminated and moisture has gotten in from the edges. One thing that might help slightly (but temporarily) is baking it in the oven - but as for temperature and duration I have no idea. I'm not sure there is any...

It was the motherboard fuse F1. Whew!

So I recently acquired a Mac Portable. As soon as it arrived I took it apart, re-capped the motherboard and hooked it up to a replacement battery. Everything was going well, actually no issue at all last night. I was able to mount some Appletalk volumes and play some games, it seemed pretty...

I just picked up my very own Macintosh Portable. I replaced the battery and recapped the motherboard and it's worked great now - just one problem, 1MB of RAM is not very much - I can't even boot System 7.1! ... Was wondering if these ersatz memory cards are still available, I'd really like one!

This is good to know.