I've got a Decmate II that has a keyboard issue. I've tested with a LK401 that I use with my Rainbow 100 system, keyboard works fine with the Rainbow but gives a error 48 with the Decmate. I've had a look at the motherboard, tracing pins 14 & 15 from the db15 connector to a series of what looks to me to be picofuses. Testing these in circuit with a multimeter, 4 of these "picofuses" show a resistance of approx. 530 ohms and the remaining 2 appear to be open. Anyone have any experience with these? Are these really picofuses? Any insights would be appreciated. Tom