Are you sure the serial cables are the same you used last time?
Cable DB-25 to DB-9 (No interposer needed) (not for modem) No P/N
Some cables miss the 6-8 shortcut.
1 Device End 13 _________________________
_³_______________________³_ | DB25 Side | DB-9 Side |
| . . . . . . . . . . . . . | |____________|____________|
\ . . . . . . . . . . . . / | Signal pin | pin Signal |
|_____________________| |____________|____________|
14 DB-25 Male 25 | TxD 2_____2 RxD |
| RxD 3_____3 TxD |
| RTS 4_____8 CTS |
5 1 | CTS 5_____7 RTS |
System _|_______|_ | DSR 6_ |
End | o o o o o | | CD 8_|___4 DTR |
\ o o o o / | S Gnd 7_____5 S Gnd |
Female / _____ \ | __6 DSR |
DB-9 9 6 | DTR 20__|__1 DCD |
|_________________________|
...
This may help...
http://publib16.boulder.ibm.com/pser...pdf/380560.pdf