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Cable box not working with data light flashing

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Cable box not working with data light flashing

I hooked up my cable box and had the "to be announced" banner where the show information would normally be and after activating the equipment online, the screen went black and the data light has been flashing ever since. Box turns on but nothing shows on the screen. Unplugged it for 1 minute after about 2 hours and then plugged it in with no change. Just a black screen with the data light flashing, no menus or anything. Checked all my connections. The coax cable is running from a splitter that the modem is also attached to. Internet is working fine.
Thanks for the help.
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