Alright, I'm still having these issues, even after the tech came by and replaced the entire wire leading into my attic. (He was the one who installed it a couple years ago and noted he always felt like that wire would cause problems eventually from the staples/cornering technique used when he installed it.) I was hopeful that it had been the issue, but alas it was not. He's stopped by once again, but after it tested fine for a while he left. He called me the next day to check on it and I noted the same issue, but frankly I doubt he believes me at this point. Apparently it's completely fine up to the demarc, which I've got to say is still an open factor; I really have no idea what it is again aside from the new wire.
After a while of using the modem/router my laptop wouldn't connect any more for some reason, (Shows as "Unable to connect" with no troubleshooting report, figures) so I had to switch back to using my router in addition to the modem. I did still have the issue just using the modem though; I could still connect with my 360 and tested it on XBL. As this issue has persisted through my old modem and my router, and now this modem+router and my current router, I don't believe these are at fault.
So it's not:
- The wire from the demarc to the splitter in the attic
- The modem+router or router
My next guess would be either a point before the demarc or the splitter in the attic, and potentially the wire from the splitter to my jack/the jack itself. I would like to replace the splitter myself, since I'd rather not bother this tech again, he's already spent a lot of time here and I'm sure he'd rather just not come back and I'm fine with that.
What do you guys think I should do? Replace splitter, jack, wire, or all/none/etc? If I need to replace the splitter I hope you guys can guide me along if I include pictures of wires etc as I'm pretty hazy on that stuff.