Chemtrail talk aside, I imagine what happened is the awful wind we had knocked their transmitter to hell (awful weather has done it before to their equipment). With the FCC spectrum auction in full swing and Boston duopoly owner Ed Ansin already announcing he has sold the spectrum of his WLVI (CW 56) and will be moving it's programming to a sub channel of WHDH (former NBC affiliate until the beginning of this year when it became an indy), I wouldn't be surprised if the "technical difficulties" carry over until the auction ends in April and they can announce the end of the station.
They've held panels in the recent past with viewers asking about their viewership habits and whether or not they were aware that nearly all of their programming (NHK World, RT, France24) is available, for free, streaming over the internet. A major market full power station is sure to net them quite a chunk of change. It'd surely be a loss for viewers who aren't internet savvy (or who don't use the internet regularly [or at all] like the elderly), but I'm guessing the motto nowadays is either adapt or get left behind.