The newer models use a RFID type device so the fuse trick is out.
Having said that ... if I read you right your issue is the data communication with the PC? If so, that printer has both USB and a NIC, this means typically if one of those interfaces go bad the other can still be used, so your printer should still be usable. My OKI 5150, which is very very close to the 3200 and the 5200 blew the NIC, but I just switched it to USB and works fine.
Also, I assume you substituted a known good cable to troubleshoot?
Just to double check on the interfaces I found this on OKI'S site for the 3200 ...
"Share the advantages.
The C3200n
comes network-ready out of the box. Your
workgroup can share the printer’s speed
and efficiencies via an internal OkiLAN
®
10/100 Base-T print server. Or an individual
user can enjoy the performance of a C3200n
through high-speed USB v2.0 connectivity."