68kMLA Classic Interface

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IIci weird death chime issue

Posted by: JRL on 2020-04-24 04:04:24 So I have a IIci here that has a particular issue. It has been recapped. With a known good set of 4 simms (I've tried 1mb and 2mb groups of 4 in bank A) it boots with no chime to a grey screen, then restarts with a chime and death chimes (normal (not slow) speed)/black screen ~5 seconds later.  With no RAM it just boots to a solid grey screen.  I've tried looking at traces and have patched a few that tested bad but now I'm at a loss as to where to look at. Of note, bank B does have two snapped off RAM clips but this behavior was all with nothing in bank B. This IIci had a Tadiran battery from factory so no leakage. Also, I haven't replaced the 74HC132 yet. Currently the IIci doesn't power on with the rear switch but powers on just fine with the KB.

Posted by: JRL on 2020-04-24 20:32:55 So update - apparently the death chime issue fixed itself. Now the IIci does the following: With internal video - startup chimes and black screen With Nubus video card - startup chimes and solid grey screen (This is on my Apple Color Plus 14" which generally works great with IIci internal video) Going to inspect traces again..

Posted by: JRL on 2020-04-24 22:49:25 Fixed a bad trace near the power switch and it *almost* works fine. With internal video though, it gives a dark black (instead of gray) screen. Nubus video works fine. Where should I look at next? Edit: Mouse movement also locks up after I reach the desktop but works fine beforehand using internal video only. With a Nubus video card everything works fine. Thanks!

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