There is an aerial cable that comes to this splitter (from the left) that splits out two cables. The one powering my modem is the one that’s damaged.
I’ve been having internet issues during the day for the last few days (I live in the northeast US, so very cold right now if that’s relevant). It’s only during the day. Internet speed is VERY slow when it’s connected (<10mbps download, <1 upload) and it is constantly disconnecting. But at nights internet is normal with no interruptions (160mbsp download, 10 upload). I had a tech scheduled to come out to fix the cable today but the guy never showed up (I could do it on my own but don’t fully trust myself with it) but it seems weird it’s only happening during the day. Is this actually the issue?
The other cable from the splitter goes nowhere, so is not an option. This is a rented house so there’s only so much I can do.
Yes. Coax is very fickle. It's really easy to cause interference or mess up the signal one way or another. Even the change in temperature over the seasons has a strong effect on signal strength.
Call the ISP to get it fixed. Or if you're up for the challenge, buy a coax stripper, a coax crimper, and some outdoor rated type-F connectors and fix it yourself.
1Dbmv per 10 degrees. Massive change between winter and summer. An open shield like this is terrible. Moisture, water, signal ingress, and egress. I'm surprised it's allowing the modem to lock in at all.
You'd be surprised what "works". I've seen cable stripped back to 3" of center conductor and duct taped into an amplifier, no fitting at all, just jammed in there. Their Internet was "working fine" but none of the Spanish language channels were working, because they were carried on 99 MHz, same channel as local radio channels. But I was blown away the modem was locking on.