Recently came into a trio of known-good MDD's: two dual 867s and one
dual 1.25.  I had personally witnessed that all three machines were
capable of booting up and running.

The 1.25 is the first one I received. It turned out to have a disabled
DVD drive, for whatever reason. After seeking the advice of the kindly
people on this board, I replaced the DVD drive (twice, because of
physical door fit, but that's another story). The new one still didn't
work.

I then came into possession of the two dual-867 machines. Both had
some one or two 512 RAM cards and one or two smaller ones, but seemed
identical in all respects.

I loaded all the 512s from the two 867 machines into one of them,
chosen pretty much at random, since I needed one machine more urgently
than two. Eventually, after some stumbling around, this turned out to
be a sweet-running (if somewhat noisy) Mac that's now being enjoyed by
my son.

The other two, though, are another matter. Eventually, I punted and
started swapping around both RAM cards and CPUs. I had two old and
small RAM cards, four newer 2700-speed 512 RAM cards, one older/slower
CPU card, and one newer/faster CPU card.

In the course of ineptly testing the slower machine, I ran it for
about 30 seconds without the heat sink on the 867 card. Bye-bye 867
card. (Yes, I know. Dumb.)

Now I have the faster CPU, both chassis, both machines' hard drives
with Tiger on them after the previous owner wiped them and reinstalled
the OS, a CD drive, a DVD drive of unknown condition, and the
aforementioned proven-good RAM cards.

Current state: Both machines, when fitted with the remaining CPU and
either hard drive, give the interrupted chime and 3 beeps that is
supposed to mean all the RAM is bad. I did the "pencil eraser and
shove 'em in real good" drill. Makes no difference whatsover.

I'm just about the point of recycling the whole mess. I'm sure this
reaction would be just about as ignorant as all my other moves up to
this point. Suggestions?

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