have unable to process request on tv says code NOSRC

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your error is a input or HDMI issue between the box and your TV if your using HDMI.

Sometimes there is incompatibility issues with certain equipment using HDMI.

You can turn off the DVR/Receiver by turning it off and unplug it from your wall outlet for 10-15 seconds.

If you are still experiencing the same issue please try to use a different HDMI cable. If changing the HDMI cable will not fix the issue you need to contact Comcast for a replacement of your DVR/receiver.

You can call Comcast at 1-800-XFINITY (1- ***-***-**** )