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8803 means an issue with the incoming signal, cable outage or account issue.
Please try unplugging your Cable box and waiting 60 seconds and then plug it back in. Also please make sure that the coax cable on the back of the box is tightly connected.
If you still have the issue then please call the Verizon Quick code number
1-866-962-1946 and enter the 4-digit quick code 8803 where you will be directed on how to resolve this issue.