I had similar problem. The internet provider's hub crashed so there was no net, and they said won't be fixed in short time, so I turned off WL700gE for the night (it is on almost 365/24) and in the morning it wouldn't turn on. But in the end it turned out to be power supply. I had it repaired and it works now. If it is not PSU (or HD), then there's not much you can do