I am having some technical problems with my 720-D, and I'm fairly sure someone can point me in the right direction.
I received the 720-D "disassembled". Completely. Nothing attached to anything else. Ugh! So, I "reassembled" it based on guesses, and what few markings I could find on the cables. The computer itself works fine now, and the drive passes all of its internal tests, but communication between the two is screwed. After further testing, I've determined that the connection between the computer and drive is fine, it is the internal connections of the drive that might be bad, or something with the drive itself.
The symptom is this: I enter a drive command, the error light comes on. No drive movement. If I THEN read the error channel (?ds$) I get nothing. If I read it directly (input#1,a,a$,b,c) I get 0, blank, 0,0. In short, I get nothing. There are two main boards in the system. A smaller board and a larger one with the processor, roms, etc. I have no idea if those boards are not connected correctly or not, but if I had some clue about what could be going on internally to cause this problem, it would help me hunt it down.
As always, appreciative,
Bo Zimmerman
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