For some unknown reason while I was running trains last night the train just stopped. After doing some checking I found that the channel for the power for that area where the train stopped was off. I tried to turn in back on but all I got was "out of RF range". I moved closer to the TIU with no luck. I recharged the batteries in the remote with no luck. I gave up for the night and when I came back today and turned the trains on I found that my TIU #4 had an address of TIU #5. I am using six TIU's on the layout. Two of which are number 5.
I have read The DCS O Gauge Companion and in Appendix J found the replacing a TIU. I very confused on how to take the old number 4 Tiu that now shows number 5 and get it back to number 4. Do I leave the TIU hooked up to the layout?, Do I leave the other 5 tiu's powered on?
I know this has been discussed in the past but I am at a lose and would appreciate anyone's help that can put this process in the simplest for for me.
Thanks in advance.