Can a modem be responsible for a lost cable TV channel?

Three cable technician have not found the reason for sound loss for a couple of seconds. Now the channel is lost; it shows a black screen. They replaced all cables, set box, and HDMI cable. Cable company used to rent me a modem, but I bought my own. I could have knocked it over. I use a splitter for TV and... show more Three cable technician have not found the reason for sound loss for a couple of seconds. Now the channel is lost; it shows a black screen. They replaced all cables, set box, and HDMI cable.

Cable company used to rent me a modem, but I bought my own. I could have knocked it over. I use a splitter for TV and computer. I replaced it for a new splitter.
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