Tnx Chris!
In fact I'm following the troubleshooting trees and I just performed a DSA (I use a type 5006 signature analyzer): it led me to a possible failure on an IC (U8 - an SN74LS00 - in the A34 board) but I replaced it and it didn't solve: I have to investigate further...
Yes the 3585A is a beast! But I'm patient...
Alberto
