I worked as an install tech for Time Warner for a about a year, and helped with/did a few service calls. I can't help with crazy shit like feeder line problems, but you would be fucking amazed at the number of problems caused be either shitty fittings or bad splitters.
The crappy $.10 a piece twist on fittings with the braids sticking all out of the fitting behind your wall plates that contractors love to use cause a fuckton of signal problems and are really easy to fix yourself. I personally went through my new house and replaced every one of those damn twist-ons. I recommend either having your cable company come out and fix them, they will. Or, invest in a compression fitting tool, and rg6 stripper, and a few compression fittings. shit can make a world of difference in your signal quality.
Also, if you are having problems try to find any splitters in your house and inspect them. I have found many a splitter hooked up wrong. In screwed into the out, out coming from the in. Splitters will still work like that but you'll get signal problems, ghosting, static, high return levels (which can play hell with your internet reliability). Without tools, a friend, and a little trial and error, can make it easy enough to ID which lines are which.
Lastly, WHEN YOU CALL TO HAVE A TECH COME OUT TELL THEM YOU WANT A COMPANY EMPLOYEE NOT A CONTRACTOR. This is probably the most important thing you can do. They will try to BS you, but if you insist, and you should, you can make them send a company tech. Most of the time company techs are much more skilled, knowledgeable, and give half a damn cause they have QA inspectors go behind them and check their work, and calls to the customer about their job. YOU WILL, MOST TIMES, GET A MUCH BETTER RESOLUTION RATE, AND BETTER OVERALL SERVICE FROM AN ACTUAL TIME WARNER/COMCAST/ WHOEVER EMPLOYEE THAN A CONTRACTOR.
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