Sony PCV-RZ44G - Manual (Page 261)

Media Center cannot change channels
If you receive your TV signal through a set-top box, then Media C enter cannot control the set-top box to change channels if the IR
control cable is not connected. C heck your IR cable connection to ensure that the cable is connected.
Note If Media C enter is not able to change channels, then TV shows might not record successfully until the IR control cable is
connected again.
Related topics
Troubleshoot your IR control cable
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