user_vjkc1i Hi there! Thanks for reaching out. We understand how frustrating it can be to run into an RDK-03003 error. This message typically indicates that your TV Box is having trouble establishing a connection. If you haven't already, please try tightening all cable connections and restarting both your Xfinity Gateway and TV Box. If the issue persists, please let us know.
XfinityPeterH
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