I have VP-200 that is collecting dusts too
like I said I don't use it daily more like once a week or so. The black screen does happen to me once in a while, and what I do is unplug the power on the router and wait for a min, then plug it back in. And that gets the VP back to normal. Sometime when the power flicked or for some reason the router misses, so its a way to reset. The VP setting is perfect as it should be so the problem is most likely is the router.