On 22-Jul-10 12:14, Roger Weichert wrote:
> The CRO shows signal on the data lines and the address lines (although not
> the same as a known good one), but nothing on the RD, IROQ, WR lines etc.
>
>    

     A short circuit perhaps?

     In case yes, desolder the pins one by one and verify again.

     Mark Jordan

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