Re: DISK II troubleshooting tips needed

[Rubywand <rubywand@swbell.net>]

Mike Willegal writes ...
> 
> Hi,
>    I've been resurrecting my old Apple II for a project I have going.
> Today the Disk II stopped responding to the PR#6 command.  No lights,
> nothing.  It happened was after swapping out a disk that had been in the
> drive for years to a different one.  With the first disk, it booted and
> worked fine.  Then I swapped it out for a second.  When I typed CATALOG,
> I got in return a Hardware Error.  Hasn't so much as lite a LED since.
> 
>    Here is the sequence
>    1) boot up with disk that had been sitting in drive for years
>    2) ran a few programs
>    3) removed disk
>    4) replaced with another one
>    5) typed catalog
>    6) Apple attempts to access disk and returns Hardware Error
>    7) the drive hasn't worked since then, nothing happens. Reseating
> card/power cycling/typical debug stuff accomplishes nothing.
> 
> if necessary, I am very capable of making HW repairs,  just need some
> pointers on where to start.
 ....

     Opening the drive door gives a Disk II a pretty good thump. Could be
that after so many years an IC was nearly loose and the thump popped it
out, at least enough to break some connections.

     Besides ideas already mentioned, consider removing the drive cover
and scootching up and re-socketing each socketed IC and any connectors.



Rubywand