ayavab

Hello, I have a 4 channel NET5404T Pelco Encoder in a 12 slot chassis. One channel out of four won't come up and I do not why. All the channels except the one that wont come up runs 1.9.2.13 software. The one channel not obeying runs 1.7.41p software. Is the mismatch in software has to do anything with the channel not coming up? I would be glad if someone could help me with regards to this/suggest any troubleshooting techniques. Should you need further information, kindly revert. Thanks.