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Fried Disk II Controller?



I recently received an Apple II+, with two Disk ][ drives from a
family relative.

At first, at least one of the drives worked fine on the controller
card, and I was reading disks with no problems.  However, when I
connected the second drive, and then powered up the computer, I got
the regular 'beep' but there was also a pop and the smell of some
circuit frying somewhere.

After turning off the computer, and disconnecting the drives, this is
what I've found:

1. The computer works fine with the interface card removed.
2. Either drive plugged into drive 1 results in the drive spinning
(red light on) but no booting/activity.

Most of the FAQ posts mention something blown on the drives, but would
I have blown both (I guess I would have heard two pops, not one).  Is
the card toast?  Can it be fixed?  Nothing on the card appears melted
or destroyed.

Any tips?

Thanks,
C.