I have a Mac IIfx that I just recapped. I now turns on, but I get no chime/sound at all.
I tested the ROM SIMM and RAM simms in another Mac and it's fine.
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Posted 13 February 2017 - 02:06 PM
Yes the speaker was connected. I am lucky enough to have another logic board. I replaced many logic chips and still no luck. I'm thinking the main 68030 CPU might be blown. It happened before on another Mac II. I played around with the scope, but it's a bit hard without the schematics.
I'll hunt for a new CPU.
Do you know if I should at least get the startup chime *without* the 68882 co-processor?
Also, to get it, I must have at least for banks of RAM filled. Is that right?
Posted Yesterday, 11:39 PM
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 OEM parts as much as possible..
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