What makes something like this just stop working?

So I purchase a WD TV lIve G3. Seem to remember it working fine for a while. Now, without moving the WD or my router. It will no longer play most video files. Straight rips from my DVDs to MKVs and Video_ts folders with Dolby Digital sound is no good. Plays for a few seconds and then starts stuttering with no audio. Is a straight DVD rip too much to handle for wireless N? I see WD got cheap and omitted support for 5GHz, which through experience is way better at this sort of thing.




Probably something in the environment changed causing substantial interference.