Replying to a 6 year old thread may not be the optimal strategy, but this was my thread . I finally got around to replacing the batteries in my Mac II (life's been busy this past 6 years). It fired up, but then I got an error message:

0000000F

0000000C

which apparently translates to "Unable to properly access the IWM chip."

So, this is replaceable, in that this is where the SWIM upgrade would go? I don't care about upgrading - just wanted to see if I could get the thing to work. In any case, any advice? Does this mean that the IWM is toast, or could something else be going on?

Thanks.